Whether bread can be converted into the body of Christ?

Objection 1. It seems that bread cannot be converted into the body of Christ. For conversion is a kind of change. But in every change there must be some subject, which from being previously in potentiality is now in act. because as is said in Phys. iii: "motion is the act of a thing existing in potentiality." But no subject can be assigned for the substance of the bread and of the body of Christ, because it is of the very nature of substance for it "not to be in a subject," as it is said in Praedic. iii. Therefore it is not possible for the whole substance of the bread to be converted into the body of Christ.

Objection 2. Further, the form of the thing into which another is converted, begins anew to inhere in the matter of the thing converted into it: as when air is changed into fire not already existing, the form of fire begins anew to be in the matter of the air; and in like manner when food is converted into non-pre-existing man, the form of the man begins to be anew in the matter of the food. Therefore, if bread be changed into the body of Christ, the form of Christ's body must necessarily begin to be in the matter of the bread, which is false. Consequently, the bread is not changed into the substance of Christ's body.

Objection 3. Further, when two things are diverse, one never becomes the other, as whiteness never becomes blackness, as is stated in Phys. i. But since two contrary forms are of themselves diverse, as being the principles of formal difference, so two signate matters are of themselves diverse, as being the principles of material distinction. Consequently, it is not possible for this matter of bread to become this matter whereby Christ's body is individuated, and so it is not possible for this substance of bread to be changed into the substance of Christ's body.

On the contrary, Eusebius Emesenus says: "To thee it ought neither to be a novelty nor an impossibility that earthly and mortal things be changed into the substance of Christ."

I answer that, As stated above (Article 2), since Christ's true body is in this sacrament, and since it does not begin to be there by local motion, nor is it contained therein as in a place, as is evident from what was stated above (Article 1, Reply to Objection 2), it must be said then that it begins to be there by conversion of the substance of bread into itself.

Yet this change is not like natural changes, but is entirely supernatural, and effected by God's power alone. Hence Ambrose says [(De Sacram. iv): "See how Christ's word changes nature's laws, as He wills: a man is not wont to be born save of man and woman: see therefore that against the established law and order a man is born of a Virgin": and] [The passage in the brackets is not in the Leonine edition] (De Myster. iv): "It is clear that a Virgin begot beyond the order of nature: and what we make is the body from the Virgin. Why, then, do you look for nature's order in Christ's body, since the Lord Jesus was Himself brought forth of a Virgin beyond nature?" Chrysostom likewise (Hom. xlvii), commenting on John 6:64: "The words which I have spoken to you," namely, of this sacrament, "are spirit and life," says: i.e. "spiritual, having nothing carnal, nor natural consequence; but they are rent from all such necessity which exists upon earth, and from the laws here established."

For it is evident that every agent acts according as it is in act. But every created agent is limited in its act, as being of a determinate genus and species: and consequently the action of every created agent bears upon some determinate act. Now the determination of every thing in actual existence comes from its form. Consequently, no natural or created agent can act except by changing the form in something; and on this account every change made according to nature's laws is a formal change. But God is infinite act, as stated in I:7:1; III:26:2; hence His action extends to the whole nature of being. Therefore He can work not only formal conversion, so that diverse forms succeed each other in the same subject; but also the change of all being, so that, to wit, the whole substance of one thing be changed into the whole substance of another. And this is done by Divine power in this sacrament; for the whole substance of the bread is changed into the whole substance of Christ's body, and the whole substance of the wine into the whole substance of Christ's blood. Hence this is not a formal, but a substantial conversion; nor is it a kind of natural movement: but, with a name of its own, it can be called "transubstantiation."

Reply to Objection 1. This objection holds good in respect of formal change, because it belongs to a form to be in matter or in a subject; but it does not hold good in respect of the change of the entire substance. Hence, since this substantial change implies a certain order of substances, one of which is changed into the other, it is in both substances as in a subject, just as order and number.

Reply to Objection 2. This argument also is true of formal conversion or change, because, as stated above (Reply to Objection 1), a form must be in some matter or subject. But this is not so in a change of the entire substance; for in this case no subject is possible.

Reply to Objection 3. Form cannot be changed into form, nor matter into matter by the power of any finite agent. Such a change, however, can be made by the power of an infinite agent, which has control over all being, because the nature of being is common to both forms and to both matters; and whatever there is of being in the one, the author of being can change into whatever there is of being in the other, withdrawing that whereby it was distinguished from the other.


Whether the accidents of the bread and wine remain in this sacrament after the change?

Objection 1. It seems that the accidents of the bread and wine do not remain in this sacrament. For when that which comes first is removed, that which follows is also taken away. But substance is naturally before accident, as is proved in Metaph. vii. Since, then, after consecration, the substance of the bread does not remain in this sacrament, it seems that its accidents cannot remain.

Objection 2. Further, there ought not to be any deception in a sacrament of truth. But we judge of substance by accidents. It seems, then, that human judgment is deceived, if, while the accidents remain, the substance of the bread does not. Consequently this is unbecoming to this sacrament.

Objection 3. Further, although our faith is not subject to reason, still it is not contrary to reason, but above it, as was said in the beginning of this work (I:1:6, ad 2; Article 8). But our reason has its origin in the senses. Therefore our faith ought not to be contrary to the senses, as it is when sense judges that to be bread which faith believes to be the substance of Christ's body. Therefore it is not befitting this sacrament for the accidents of bread to remain subject to the senses, and for the substance of bread not to remain.

Objection 4. Further, what remains after the change has taken place seems to be the subject of change. If therefore the accidents of the bread remain after the change has been effected, it seems that the accidents are the subject of the change. But this is impossible; for "an accident cannot have an accident" (Metaph. iii). Therefore the accidents of the bread and wine ought not to remain in this sacrament.

On the contrary, Augustine says in his book on the Sentences of Prosper (Lanfranc, De Corp. et Sang. Dom. xiii): "Under the species which we behold, of bread and wine, we honor invisible things, i.e. flesh and blood."

I answer that, It is evident to sense that all the accidents of the bread and wine remain after the consecration. And this is reasonably done by Divine providence. First of all, because it is not customary, but horrible, for men to eat human flesh, and to drink blood. And therefore Christ's flesh and blood are set before us to be partaken of under the species of those things which are the more commonly used by men, namely, bread and wine. Secondly, lest this sacrament might be derided by unbelievers, if we were to eat our Lord under His own species. Thirdly, that while we receive our Lord's body and blood invisibly, this may redound to the merit of faith.

Reply to Objection 1. As is said in the book De Causis, an effect depends more on the first cause than on the second. And therefore by God's power, which is the first cause of all things, it is possible for that which follows to remain, while that which is first is taken away.

Reply to Objection 2. There is no deception in this sacrament; for the accidents which are discerned by the senses are truly present. But the intellect, whose proper object is substance as is said in De Anima iii, is preserved by faith from deception. And this serves as answer to the third argument; because faith is not contrary to the senses, but concerns things to which sense does not reach.

Reply to Objection 4. This change has not properly a subject, as was stated above (Article 4, Reply to Objection 1); nevertheless the accidents which remain have some resemblance of a subject.


Whether the substantial form of the bread remains in this sacrament after the consecration?

Objection 1. It seems that the substantial form of the bread remains in this sacrament after the consecration. For it has been said (Article 5) that the accidents remain after the consecration. But since bread is an artificial thing, its form is an accident. Therefore it remains after the consecration.

Objection 2. Further, the form of Christ's body is His soul: for it is said in De Anima ii, that the soul "is the act of a physical body which has life in potentiality". But it cannot be said that the substantial form of the bread is changed into the soul. Therefore it appears that it remains after the consecration.

Objection 3. Further, the proper operation of a things follows its substantial form. But what remains in this sacrament, nourishes, and performs every operation which bread would do were it present. Therefore the substantial form of the bread remains in this sacrament after the consecration.

On the contrary, The substantial form of bread is of the substance of bread. But the substance of the bread is changed into the body of Christ, as stated above (Article 2,Article 3,Article 4). Therefore the substantial form of the bread does not remain.

I answer that, Some have contended that after the consecration not only do the accidents of the bread remain, but also its substantial form. But this cannot be. First of all, because if the substantial form of the bread were to remain, nothing of the bread would be changed into the body of Christ, excepting the matter; and so it would follow that it would be changed, not into the whole body of Christ, but into its matter, which is repugnant to the form of the sacrament, wherein it is said: "This is My body."

Secondly, because if the substantial form of the bread were to remain, it would remain either in matter, or separated from matter. The first cannot be, for if it were to remain in the matter of the bread, then the whole substance of the bread would remain, which is against what was said above (Article 2). Nor could it remain in any other matter, because the proper form exists only in its proper matter. But if it were to remain separate from matter, it would then be an actually intelligible form, and also an intelligence; for all forms separated from matter are such.

Thirdly, it would be unbefitting this sacrament: because the accidents of the bread remain in this sacrament, in order that the body of Christ may be seen under them, and not under its proper species, as stated above (Article 5).

And therefore it must be said that the substantial form of the bread does not remain.

Reply to Objection 1. There is nothing to prevent art from making a thing whose form is not an accident, but a substantial form; as frogs and serpents can be produced by art: for art produces such forms not by its own power, but by the power of natural energies. And in this way it produces the substantial forms of bread, by the power of fire baking the matter made up of flour and water.

Reply to Objection 2. The soul is the form of the body, giving it the whole order of perfect being, i.e. being, corporeal being, and animated being, and so on. Therefore the form of the bread is changed into the form of Christ's body, according as the latter gives corporeal being, but not according as it bestows animated being.

Reply to Objection 3. Some of the operations of bread follow it by reason of the accidents, such as to affect the senses, and such operations are found in the species of the bread after the consecration on account of the accidents which remain. But some other operations follow the bread either by reason of the matter, such as that it is changed into something else, or else by reason of the substantial form, such as an operation consequent upon its species, for instance, that it "strengthens man's heart" (Psalm 103:15); and such operations are found in this sacrament, not on account of the form or matter remaining, but because they are bestowed miraculously upon the accidents themselves, as will be said later (III:77:3, ad 2,3; Articles 5 and 6).


Whether this change is wrought instantaneously?

Objection 1. It seems that this change is not wrought instantaneously, but successively. For in this change there is first the substance of bread, and afterwards the substance of Christ's body. Neither, then, is in the same instant, but in two instants. But there is a mid-time between every two instants. Therefore this change must take place according to the succession of time, which is between the last instant in which the bread is there, and the first instant in which the body of Christ is present.

Objection 2. Further, in every change something is "in becoming" and something is "in being." But these two things do not exist at the one time for, what is "in becoming," is not yet, whereas what is "in being," already is. Consequently, there is a before and an after in such change: and so necessarily the change cannot be instantaneous, but successive.

Objection 3. Further, Ambrose says (De Sacram. iv) that this sacrament "is made by the words of Christ." But Christ's words are pronounced successively. Therefore the change takes place successively.

On the contrary, This change is effected by a power which is infinite, to which it belongs to operate in an instant.

I answer that, A change may be instantaneous from a threefold reason. First on the part of the form, which is the terminus of the change. For, if it be a form that receives more and less, it is acquired by its subject successively, such as health; and therefore because a substantial form does not receive more and less, it follows that its introduction into matter is instantaneous.

Secondly on the part of the subject, which sometimes is prepared successively for receiving the form; thus water is heated successively. When, however, the subject itself is in the ultimate disposition for receiving the form, it receives it suddenly, as a transparent body is illuminated suddenly. Thirdly on the part of the agent, which possesses infinite power: wherefore it can instantly dispose the matter for the form. Thus it is written (Mark 7:34) that when Christ had said, "'Ephpheta,' which is 'Be thou opened,' immediately his ears were opened, and the string of his tongue was loosed."

For these three reasons this conversion is instantaneous. First, because the substance of Christ's body which is the term of this conversion, does not receive more or less. Secondly, because in this conversion there is no subject to be disposed successively. Thirdly, because it is effected by God's infinite power.

Reply to Objection 1. Some [Cf. Albert the Great, Sent. iv, D, 11; St. Bonaventure, Sent., iv, D, 11] do not grant simply that there is a mid-time between every two instants. For they say that this is true of two instants referring to the same movement, but not if they refer to different things. Hence between the instant that marks the close of rest, and another which marks the beginning of movement, there is no mid-time. But in this they are mistaken, because the unity of time and of instant, or even their plurality, is not taken according to movements of any sort, but according to the first movement of the heavens, which is the measure of all movement and rest.

Accordingly others grant this of the time which measures movement depending on the movement of the heavens. But there are some movements which are not dependent on the movement of the heavens, nor measured by it, as was said in I:53:3 concerning the movements of the angels. Hence between two instants responding to those movements there is no mid-time. But this is not to the point, because although the change in question has no relation of itself to the movement of the heavens, still it follows the pronouncing of the words, which (pronouncing) must necessarily be measured by the movement of the heavens. And therefore there must of necessity be a mid-time between every two signate instants in connection with that change.

Some say therefore that the instant in which the bread was last, and the instant in which the body of Christ is first, are indeed two in comparison with the things measured, but are one comparatively to the time measuring; as when two lines touch, there are two points on the part of the two lines, but one point on the part of the place containing them. But here there is no likeness, because instant and time is not the intrinsic measure of particular movements, as a line and point are of a body, but only the extrinsic measure, as place is to bodies.

Hence others say that it is the same instant in fact, but another according to reason. But according to this it would follow that things really opposite would exist together; for diversity of reason does not change a thing objectively.

And therefore it must be said that this change, as stated above, is wrought by Christ's words which are spoken by the priest, so that the last instant of pronouncing the words is the first instant in which Christ's body is in the sacrament; and that the substance of the bread is there during the whole preceding time. Of this time no instant is to be taken as proximately preceding the last one, because time is not made up of successive instants, as is proved in Phys. vi. And therefore a first instant can be assigned in which Christ's body is present; but a last instant cannot be assigned in which the substance of bread is there, but a last time can be assigned. And the same holds good in natural changes, as is evident from the Philosopher (Phys. viii).

Reply to Objection 2. In instantaneous changes a thing is "in becoming," and is "in being" simultaneously; just as becoming illuminated and to be actually illuminated are simultaneous: for in such, a thing is said to be "in being" according as it now is; but to be "in becoming," according as it was not before.

Reply to Objection 3. As stated above (Reply to Objection 1), this change comes about in the last instant of the pronouncing of the words. for then the meaning of the words is finished, which meaning is efficacious in the forms of the sacraments. And therefore it does not follow that this change is successive.


Whether this proposition is false: "The body of Christ is made out of bread"?

Objection 1. It seems that this proposition is false: "The body of Christ is made out of bread." For everything out of which another is made, is that which is made the other; but not conversely: for we say that a black thing is made out of a white thing, and that a white thing is made black: and although we may say that a man becomes black still we do not say that a black thing is made out of a man, as is shown in Phys. i. If it be true, then, that Christ's body is made out of bread, it will be true to say that bread is made the body of Christ. But this seems to be false, because the bread is not the subject of the making, but rather its term. Therefore, it is not said truly that Christ's body is made out of bread.

Objection 2. Further, the term of "becoming" is something that is, or something that is "made." But this proposition is never true: "The bread is the body of Christ"; or "The bread is made the body of Christ"; or again, "The bread will be the body of Christ." Therefore it seems that not even this is true: "The body of Christ is made out of bread."

Objection 3. Further, everything out of which another is made is converted into that which is made from it. But this proposition seems to be false: "The bread is converted into the body of Christ," because such conversion seems to be more miraculous than the creation of the world, in which it is not said that non-being is converted into being. Therefore it seems that this proposition likewise is false: "The body of Christ is made out of bread."

Objection 4. Further, that out of which something is made, can be that thing. But this proposition is false: "Bread can be the body of Christ." Therefore this is likewise false: "The body of Christ is made out of bread."

On the contrary, Ambrose says (De Sacram. iv): "When the consecration takes place, the body of Christ is made out of the bread."

I answer that, This conversion of bread into the body of Christ has something in common with creation, and with natural transmutation, and in some respect differs from both. For the order of the terms is common to these three; that is, that after one thing there is another (for, in creation there is being after non-being; in this sacrament, Christ's body after the substance of bread; in natural transmutation white after black, or fire after air); and that the aforesaid terms are not coexistent.

Now the conversion, of which we are speaking, has this in common with creation, that in neither of them is there any common subject belonging to either of the extremes; the contrary of which appears in every natural transmutation.

Again, this conversion has something in common with natural transmutation in two respects, although not in the same fashion. First of all because in both, one of the extremes passes into the other, as bread into Christ's body, and air into fire; whereas non-being is not converted into being. But this comes to pass differently on the one side and on the other; for in this sacrament the whole substance of the bread passes into the whole body of Christ; whereas in natural transmutation the matter of the one receives the form of the other, the previous form being laid aside. Secondly, they have this in common, that on both sides something remains the same; whereas this does not happen in creation: yet differently; for the same matter or subject remains in natural transmutation; whereas in this sacrament the same accidents remain.

From these observations we can gather the various ways of speaking in such matters. For, because in no one of the aforesaid three things are the extremes coexistent, therefore in none of them can one extreme be predicated of the other by the substantive verb of the present tense: for we do not say, "Non-being is being" or, "Bread is the body of Christ," or, "Air is fire," or, "White is black." Yet because of the relationship of the extremes in all of them we can use the preposition "ex" [out of, which denotes order; for we can truly and properly say that "being is made out of non-being," and "out of bread, the body of Christ," and "out of air, fire," and "out of white, black." But because in creation one of the extremes does not pass into the other, we cannot use the word "conversion" in creation, so as to say that "non-being is converted into being": we can, however, use the word in this sacrament, just as in natural transmutation. But since in this sacrament the whole substance is converted into the whole substance, on that account this conversion is properly termed transubstantiation.

Again, since there is no subject of this conversion, the things which are true in natural conversion by reason of the subject, are not to be granted in this conversion. And in the first place indeed it is evident that potentiality to the opposite follows a subject, by reason whereof we say that "a white thing can be black," or that "air can be fire"; although the latter is not so proper as the former: for the subject of whiteness, in which there is potentiality to blackness, is the whole substance of the white thing; since whiteness is not a part thereof; whereas the subject of the form of air is part thereof: hence when it is said, "Air can be fire," it is verified by synecdoche by reason of the part. But in this conversion, and similarly in creation, because there is no subject, it is not said that one extreme can be the other, as that "non-being can be being," or that "bread can be the body of Christ": and for the same reason it cannot be properly said that "being is made of [de] non-being," or that "the body of Christ is made of bread," because this preposition "of" [de] denotes a consubstantial cause, which consubstantiality of the extremes in natural transmutations is considered according to something common in the subject. And for the same reason it is not granted that "bread will be the body of Christ," or that it "may become the body of Christ," just as it is not granted in creation that "non-being will be being," or that "non-being may become being," because this manner of speaking is verified in natural transmutations by reason of the subject: for instance, when we say that "a white thing becomes black," or "a white thing will be black."

Nevertheless, since in this sacrament, after the change, something remains the same, namely, the accidents of the bread, as stated above (Article 5), some of these expressions may be admitted by way of similitude, namely, that "bread is the body of Christ," or, "bread will be the body of Christ," or "the body of Christ is made of bread"; provided that by the word "bread" is not understood the substance of bread, but in general "that which is contained under the species of bread," under which species there is first contained the substance of bread, and afterwards the body of Christ.

Reply to Objection 1. That out of which something else is made, sometimes implies together with the subject, one of the extremes of the transmutation, as when it is said "a black thing is made out of a white one"; but sometimes it implies only the opposite or the extreme, as when it is said—"out of morning comes the day." And so it is not granted that the latter becomes the former, that is, "that morning becomes the day." So likewise in the matter in hand, although it may be said properly that "the body of Christ is made out of bread," yet it is not said properly that "bread becomes the body of Christ," except by similitude, as was said above.

Reply to Objection 2. That out of which another is made, will sometimes be that other because of the subject which is implied. And therefore, since there is no subject of this change, the comparison does not hold.

Reply to Objection 3. In this change there are many more difficulties than in creation, in which there is but this one difficulty, that something is made out of nothing; yet this belongs to the proper mode of production of the first cause, which presupposes nothing else. But in this conversion not only is it difficult for this whole to be changed into that whole, so that nothing of the former may remain (which does not belong to the common mode of production of a cause), but furthermore it has this difficulty that the accidents remain while the substance is destroyed, and many other difficulties of which we shall treat hereafter (III:77. Nevertheless the word "conversion" is admitted in this sacrament, but not in creation, as stated above.

Reply to Objection 4. As was observed above, potentiality belongs to the subject, whereas there is no subject in this conversion. And therefore it is not granted that bread can be the body of Christ: for this conversion does not come about by the passive potentiality of the creature, but solely by the active power of the Creator.

The Summa Theologiæ of St. Thomas AquinasSecond and Revised Edition, 1920Literally translated by Fathers of the English Dominican ProvinceOnline Edition Copyright © 2017 by Kevin Knight Nihil Obstat. F. Innocentius Apap, O.P., S.T.M., Censor. Theol.Imprimatur. Edus. Canonicus Surmont, Vicarius Generalis. Westmonasterii.APPROBATIO ORDINISNihil Obstat. F. Raphael Moss, O.P., S.T.L. and F. Leo Moore, O.P., S.T.L.Imprimatur. F. Beda Jarrett, O.P., S.T.L., A.M., Prior Provincialis AngliæMARIÆ IMMACULATÆ - SEDI SAPIENTIÆ

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Whether the whole Christ is contained under this sacrament?

Objection 1. It seems that the whole Christ is not contained under this sacrament, because Christ begins to be in this sacrament by conversion of the bread and wine. But it is evident that the bread and wine cannot be changed either into the Godhead or into the soul of Christ. Since therefore Christ exists in three substances, namely, the Godhead, soul and body, as shown above (III:2:5; III:5:3), it seems that the entire Christ is not under this sacrament.

Objection 2. Further, Christ is in this sacrament, forasmuch as it is ordained to the refection of the faithful, which consists in food and drink, as stated above (III:74:1). But our Lord said (John 6:56): "My flesh is meat indeed, and My blood is drink indeed." Therefore, only the flesh and blood of Christ are contained in this sacrament. But there are many other parts of Christ's body, for instance, the nerves, bones, and such like. Therefore the entire Christ is not contained under this sacrament.

Objection 3. Further, a body of greater quantity cannot be contained under the measure of a lesser. But the measure of the bread and wine is much smaller than the measure of Christ's body. Therefore it is impossible that the entire Christ be contained under this sacrament.

On the contrary, Ambrose says (De Officiis): "Christ is in this sacrament."

I answer that, It is absolutely necessary to confess according to Catholic faith that the entire Christ is in this sacrament. Yet we must know that there is something of Christ in this sacrament in a twofold manner: first, as it were, by the power of the sacrament; secondly, from natural concomitance. By the power of the sacrament, there is under the species of this sacrament that into which the pre-existing substance of the bread and wine is changed, as expressed by the words of the form, which are effective in this as in the other sacraments; for instance, by the words: "This is My body," or, "This is My blood." But from natural concomitance there is also in this sacrament that which is really united with that thing wherein the aforesaid conversion is terminated. For if any two things be really united, then wherever the one is really, there must the other also be: since things really united together are only distinguished by an operation of the mind.

Reply to Objection 1. Because the change of the bread and wine is not terminated at the Godhead or the soul of Christ, it follows as a consequence that the Godhead or the soul of Christ is in this sacrament not by the power of the sacrament, but from real concomitance. For since the Godhead never set aside the assumed body, wherever the body of Christ is, there, of necessity, must the Godhead be; and therefore it is necessary for the Godhead to be in this sacrament concomitantly with His body. Hence we read in the profession of faith at Ephesus (P. I., chap. xxvi): "We are made partakers of the body and blood of Christ, not as taking common flesh, nor as of a holy man united to the Word in dignity, but the truly life-giving flesh of the Word Himself."

On the other hand, His soul was truly separated from His body, as stated above (III:50:5). And therefore had this sacrament been celebrated during those three days when He was dead, the soul of Christ would not have been there, neither by the power of the sacrament, nor from real concomitance. But since "Christ rising from the dead dieth now no more" (Romans 6:9), His soul is always really united with His body. And therefore in this sacrament the body indeed of Christ is present by the power of the sacrament, but His soul from real concomitance.

Reply to Objection 2. By the power of the sacrament there is contained under it, as to the species of the bread, not only the flesh, but the entire body of Christ, that is, the bones the nerves, and the like. And this is apparent from the form of this sacrament, wherein it is not said: "This is My flesh," but "This is My body." Accordingly, when our Lord said (John 6:56): "My flesh is meat indeed," there the word flesh is put for the entire body, because according to human custom it seems to be more adapted for eating, as men commonly are fed on the flesh of animals, but not on the bones or the like.

Reply to Objection 3. As has been already stated (III:75:5, after the consecration of the bread into the body of Christ, or of the wine into His blood, the accidents of both remain. From which it is evident that the dimensions of the bread or wine are not changed into the dimensions of the body of Christ, but substance into substance. And so the substance of Christ's body or blood is under this sacrament by the power of the sacrament, but not the dimensions of Christ's body or blood. Hence it is clear that the body of Christ is in this sacrament "by way of substance," and not by way of quantity. But the proper totality of substance is contained indifferently in a small or large quantity; as the whole nature of air in a great or small amount of air, and the whole nature of a man in a big or small individual. Wherefore, after the consecration, the whole substance of Christ's body and blood is contained in this sacrament, just as the whole substance of the bread and wine was contained there before the consecration.


Whether the whole Christ is contained under each species of this sacrament?

Objection 1. It seems that the whole Christ is not contained under both species of this sacrament. For this sacrament is ordained for the salvation of the faithful, not by virtue of the species, but by virtue of what is contained under the species, because the species were there even before the consecration, from which comes the power of this sacrament. If nothing, then, be contained under one species, but what is contained under the other, and if the whole Christ be contained under both, it seems that one of them is superfluous in this sacrament.

Objection 2. Further, it was stated above (Article 1, Reply to Objection 1) that all the other parts of the body, such as the bones, nerves, and the like, are comprised under the name of flesh. But the blood is one of the parts of the human body, as Aristotle proves (De Anima Histor. i). If, then, Christ's blood be contained under the species of bread, just as the other parts of the body are contained there, the blood ought not to be consecrated apart, just as no other part of the body is consecrated separately.

Objection 3. Further, what is once "in being" cannot be again "in becoming." But Christ's body has already begun to be in this sacrament by the consecration of the bread. Therefore, it cannot begin again to be there by the consecration of the wine; and so Christ's body will not be contained under the species of the wine, and accordingly neither the entire Christ. Therefore the whole Christ is not contained under each species.

On the contrary, The gloss on 1 Corinthians 11:25, commenting on the word "Chalice," says that "under each species," namely, of the bread and wine, "the same is received"; and thus it seems that Christ is entire under each species.

I answer that, After what we have said above (Article 1), it must be held most certainly that the whole Christ is under each sacramental species yet not alike in each. For the body of Christ is indeed present under the species of bread by the power of the sacrament, while the blood is there from real concomitance, as stated above (Article 1, Reply to Objection 1) in regard to the soul and Godhead of Christ; and under the species of wine the blood is present by the power of the sacrament, and His body by real concomitance, as is also His soul and Godhead: because now Christ's blood is not separated from His body, as it was at the time of His Passion and death. Hence if this sacrament had been celebrated then, the body of Christ would have been under the species of the bread, but without the blood; and, under the species of the wine, the blood would have been present without the body, as it was then, in fact.

Reply to Objection 1. Although the whole Christ is under each species, yet it is so not without purpose. For in the first place this serves to represent Christ's Passion, in which the blood was separated from the body; hence in the form for the consecration of the blood mention is made of its shedding. Secondly, it is in keeping with the use of this sacrament, that Christ's body be shown apart to the faithful as food, and the blood as drink. Thirdly, it is in keeping with its effect, in which sense it was stated above (III:74:1) that "the body is offered for the salvation of the body, and the blood for the salvation of the soul."

Reply to Objection 2. In Christ's Passion, of which this is the memorial, the other parts of the body were not separated from one another, as the blood was, but the body remained entire, according to Exodus 12:46: "You shall not break a bone thereof." And therefore in this sacrament the blood is consecrated apart from the body, but no other part is consecrated separately from the rest.

Reply to Objection 3. As stated above, the body of Christ is not under the species of wine by the power of the sacrament, but by real concomitance: and therefore by the consecration of the wine the body of Christ is not there of itself, but concomitantly.


Whether Christ is entire under every part of the species of the bread and wine?

Objection 1. It seems that Christ is not entire under every part of the species of bread and wine. Because those species can be divided infinitely. If therefore Christ be entirely under every part of the said species, it would follow that He is in this sacrament an infinite number of times: which is unreasonable; because the infinite is repugnant not only to nature, but likewise to grace.

Objection 2. Further, since Christ's is an organic body, it has parts determinately distant. for a determinate distance of the individual parts from each other is of the very nature of an organic body, as that of eye from eye, and eye from ear. But this could not be so, if Christ were entire under every part of the species; for every part would have to be under every other part, and so where one part would be, there another part would be. It cannot be then that the entire Christ is under every part of the host or of the wine contained in the chalice.

Objection 3. Further, Christ's body always retains the true nature of a body, nor is it ever changed into a spirit. Now it is the nature of a body for it to be "quantity having position" (Predic. iv). But it belongs to the nature of this quantity that the various parts exist in various parts of place. Therefore, apparently it is impossible for the entire Christ to be under every part of the species.

On the contrary, Augustine says in a sermon (Gregory, Sacramentarium): "Each receives Christ the Lord, Who is entire under every morsel, nor is He less in each portion, but bestows Himself entire under each."

I answer that, As was observed above (Article 1, Reply to Objection 3), because the substance of Christ's body is in this sacrament by the power of the sacrament, while dimensive quantity is there by reason of real concomitance, consequently Christ's body is in this sacrament substantively, that is, in the way in which substance is under dimensions, but not after the manner of dimensions, which means, not in the way in which the dimensive quantity of a body is under the dimensive quantity of place.

Now it is evident that the whole nature of a substance is under every part of the dimensions under which it is contained; just as the entire nature of air is under every part of air, and the entire nature of bread under every part of bread; and this indifferently, whether the dimensions be actually divided (as when the air is divided or the bread cut), or whether they be actually undivided, but potentially divisible. And therefore it is manifest that the entire Christ is under every part of the species of the bread, even while the host remains entire, and not merely when it is broken, as some say, giving the example of an image which appears in a mirror, which appears as one in the unbroken mirror, whereas when the mirror is broken, there is an image in each part of the broken mirror: for the comparison is not perfect, because the multiplying of such images results in the broken mirror on account of the various reflections in the various parts of the mirror; but here there is only one consecration, whereby Christ's body is in this sacrament.

Reply to Objection 1. Number follows division, and therefore so long as quantity remains actually undivided, neither is the substance of any thing several times under its proper dimensions, nor is Christ's body several times under the dimensions of the bread; and consequently not an infinite number of times, but just as many times as it is divided into parts.

Reply to Objection 2. The determinate distance of parts in an organic body is based upon its dimensive quantity; but the nature of substance precedes even dimensive quantity. And since the conversion of the substance of the bread is terminated at the substance of the body of Christ, and since according to the manner of substance the body of Christ is properly and directly in this sacrament; such distance of parts is indeed in Christ's true body, which, however, is not compared to this sacrament according to such distance, but according to the manner of its substance, as stated above (Article 1, Reply to Objection 3).

Reply to Objection 3. This argument is based on the nature of a body, arising from dimensive quantity. But it was said above (Reply to Objection 2) that Christ's body is compared with this sacrament not by reason of dimensive quantity, but by reason of its substance, as already stated.


Whether the whole dimensive quantity of Christ's body is in this sacrament?

Objection 1. It seems that the whole dimensive quantity of Christ's body is not in this sacrament. For it was said (Article 3) that Christ's entire body is contained under every part of the consecrated host. But no dimensive quantity is contained entirely in any whole, and in its every part. Therefore it is impossible for the entire dimensive quantity of Christ's body to be there.

Objection 2. Further, it is impossible for two dimensive quantities to be together, even though one be separate from its subject, and the other in a natural body, as is clear from the Philosopher (Metaph. iii). But the dimensive quantity of the bread remains in this sacrament, as is evident to our senses. Consequently, the dimensive quantity of Christ's body is not there.

Objection 3. Further, if two unequal dimensive quantities be set side by side, the greater will overlap the lesser. But the dimensive quantity of Christ's body is considerably larger than the dimensive quantity of the consecrated host according to every dimension. Therefore, if the dimensive quantity of Christ's body be in this sacrament together with the dimensive quantity of the host, the dimensive quantity of Christ's body is extended beyond the quantity of the host, which nevertheless is not without the substance of Christ's body. Therefore, the substance of Christ's body will be in this sacrament even outside the species of the bread, which is unreasonable, since the substance of Christ's body is in this sacrament, only by the consecration of the bread, as stated above (Article 2). Consequently, it is impossible for the whole dimensive quantity of Christ's body to be in this sacrament.

On the contrary, The existence of the dimensive quantity of any body cannot be separated from the existence of its substance. But in this sacrament the entire substance of Christ's body is present, as stated above (Article 1,Article 3). Therefore the entire dimensive quantity of Christ's body is in this sacrament.

I answer that, As stated above (Article 1), any part of Christ is in this sacrament in two ways: in one way, by the power of the sacrament; in another, from real concomitance. By the power of the sacrament the dimensive quantity of Christ's body is not in this sacrament; for, by the power of the sacrament that is present in this sacrament, whereat the conversion is terminated. But the conversion which takes place in this sacrament is terminated directly at the substance of Christ's body, and not at its dimensions; which is evident from the fact that the dimensive quantity of the bread remains after the consecration, while only the substance of the bread passes away.

Nevertheless, since the substance of Christ's body is not really deprived of its dimensive quantity and its other accidents, hence it comes that by reason of real concomitance the whole dimensive quantity of Christ's body and all its other accidents are in this sacrament.

Reply to Objection 1. The manner of being of every thing is determined by what belongs to it of itself, and not according to what is coupled accidentally with it: thus an object is present to the sight, according as it is white, and not according as it is sweet, although the same object may be both white and sweet; hence sweetness is in the sight after the manner of whiteness, and not after that of sweetness. Since, then, the substance of Christ's body is present on the altar by the power of this sacrament, while its dimensive quantity is there concomitantly and as it were accidentally, therefore the dimensive quantity of Christ's body is in this sacrament, not according to its proper manner (namely, that the whole is in the whole, and the individual parts in individual parts), but after the manner of substance, whose nature is for the whole to be in the whole, and the whole in every part.

Reply to Objection 2. Two dimensive quantities cannot naturally be in the same subject at the same time, so that each be there according to the proper manner of dimensive quantity. But in this sacrament the dimensive quantity of the bread is there after its proper manner, that is, according to commensuration: not so the dimensive quantity of Christ's body, for that is there after the manner of substance, as stated above (Reply to Objection 1).

Reply to Objection 3. The dimensive quantity of Christ's body is in this sacrament not by way of commensuration, which is proper to quantity, and to which it belongs for the greater to be extended beyond the lesser; but in the way mentioned above (ad 1,2).


Whether Christ's body is in this sacrament as in a place?

Objection 1. It seems that Christ's body is in this sacrament as in a place. Because, to be in a place definitively or circumscriptively belongs to being in a place. But Christ's body seems to be definitively in this sacrament, because it is so present where the species of the bread and wine are, that it is nowhere else upon the altar: likewise it seems to be there circumscriptively, because it is so contained under the species of the consecrated host, that it neither exceeds it nor is exceeded by it. Therefore Christ's body is in this sacrament as in a place.

Objection 2. Further, the place of the bread and wine is not empty, because nature abhors a vacuum; nor is the substance of the bread there, as stated above (III:75:2); but only the body of Christ is there. Consequently the body of Christ fills that place. But whatever fills a place is there locally. Therefore the body of Christ is in this sacrament locally.

Objection 3. Further, as stated above (Article 4), the body of Christ is in this sacrament with its dimensive quantity, and with all its accidents. But to be in a place is an accident of a body; hence "where" is numbered among the nine kinds of accidents. Therefore Christ's body is in this sacrament locally.

On the contrary, The place and the object placed must be equal, as is clear from the Philosopher (Phys. iv). But the place, where this sacrament is, is much less than the body of Christ. Therefore Christ's body is not in this sacrament as in a place.

I answer that, As stated above (Article 1, Reply to Objection 3; Article 3), Christ's body is in this sacrament not after the proper manner of dimensive quantity, but rather after the manner of substance. But every body occupying a place is in the place according to the manner of dimensive quantity, namely, inasmuch as it is commensurate with the place according to its dimensive quantity. Hence it remains that Christ's body is not in this sacrament as in a place, but after the manner of substance, that is to say, in that way in which substance is contained by dimensions; because the substance of Christ's body succeeds the substance of bread in this sacrament: hence as the substance of bread was not locally under its dimensions, but after the manner of substance, so neither is the substance of Christ's body. Nevertheless the substance of Christ's body is not the subject of those dimensions, as was the substance of the bread: and therefore the substance of the bread was there locally by reason of its dimensions, because it was compared with that place through the medium of its own dimensions; but the substance of Christ's body is compared with that place through the medium of foreign dimensions, so that, on the contrary, the proper dimensions of Christ's body are compared with that place through the medium of substance; which is contrary to the notion of a located body.

Hence in no way is Christ's body locally in this sacrament.

Reply to Objection 1. Christ's body is not in this sacrament definitively, because then it would be only on the particular altar where this sacrament is performed: whereas it is in heaven under its own species, and on many other altars under the sacramental species. Likewise it is evident that it is not in this sacrament circumscriptively, because it is not there according to the commensuration of its own quantity, as stated above. But that it is not outside the superficies of the sacrament, nor on any other part of the altar, is due not to its being there definitively or circumscriptively, but to its being there by consecration and conversion of the bread and wine, as stated above (Article 1; 15, 2, sqq.).

Reply to Objection 2. The place in which Christ's body is, is not empty; nor yet is it properly filled with the substance of Christ's body, which is not there locally, as stated above; but it is filled with the sacramental species, which have to fill the place either because of the nature of dimensions, or at least miraculously, as they also subsist miraculously after the fashion of substance.

Reply to Objection 3. As stated above (Article 4), the accidents of Christ's body are in this sacrament by real concomitance. And therefore those accidents of Christ's body which are intrinsic to it are in this sacrament. But to be in a place is an accident when compared with the extrinsic container. And therefore it is not necessary for Christ to be in this sacrament as in a place.


Whether Christ's body is in this sacrament movably?

Objection 1. It seems that Christ's body is movably in this sacrament, because the Philosopher says (Topic. ii) that "when we are moved, the things within us are moved": and this is true even of the soul's spiritual substance. "But Christ is in this sacrament," as shown above (III:74:1. Therefore He is moved when it is moved.

Objection 2. Further, the truth ought to correspond with the figure. But, according to the commandment (Exodus 12:10), concerning the Paschal Lamb, a figure of this sacrament, "there remained nothing until the morning." Neither, therefore, if this sacrament be reserved until morning, will Christ's body be there; and so it is not immovably in this sacrament.

Objection 3. Further, if Christ's body were to remain under this sacrament even until the morrow, for the same reason it will remain there during all coming time; for it cannot be said that it ceases to be there when the species pass, because the existence of Christ's body is not dependent on those species. Yet Christ does not remain in this sacrament for all coming time. It seems, then, that straightway on the morrow, or after a short time, He ceases to be under this sacrament. And so it seems that Christ is in this sacrament movably.

On the contrary, it is impossible for the same thing to be in motion and at rest, else contradictories would be verified of the same subject. But Christ's body is at rest in heaven. Therefore it is not movably in this sacrament.

I answer that, When any thing is one, as to subject, and manifold in being, there is nothing to hinder it from being moved in one respect, and yet to remain at rest in another just as it is one thing for a body to be white, and another thing, to be large; hence it can be moved as to its whiteness, and yet continue unmoved as to its magnitude. But in Christ, being in Himself and being under the sacrament are not the same thing, because when we say that He is under this sacrament, we express a kind of relationship to this sacrament. According to this being, then, Christ is not moved locally of Himself, but only accidentally, because Christ is not in this sacrament as in a place, as stated above (Article 5). But what is not in a place, is not moved of itself locally, but only according to the motion of the subject in which it is.

In the same way neither is it moved of itself according to the being which it has in this sacrament, by any other change whatever, as for instance, that it ceases to be under this sacrament: because whatever possesses unfailing existence of itself, cannot be the principle of failing; but when something else fails, then it ceases to be in it; just as God, Whose existence is unfailing and immortal, ceases to be in some corruptible creature because such corruptible creature ceases to exist. And in this way, since Christ has unfailing and incorruptible being, He ceases to be under this sacrament, not because He ceases to be, nor yet by local movement of His own, as is clear from what has been said, but only by the fact that the sacramental species cease to exist.

Hence it is clear that Christ, strictly speaking is immovably in this sacrament.

Reply to Objection 1. This argument deals with accidental movement, whereby things within us are moved together with us. But with things which can of themselves be in a place, like bodies, it is otherwise than with things which cannot of themselves be in a place, such as forms and spiritual substances. And to this mode can be reduced what we say of Christ, being moved accidentally, according to the existence which He has in this sacrament, in which He is not present as in a place.

Reply to Objection 2. It was this argument which seems to have convinced those who held that Christ's body does not remain under this sacrament if it be reserved until the morrow. It is against these that Cyril says (Ep. lxxxiii): "Some are so foolish as to say that the mystical blessing departs from the sacrament, if any of its fragments remain until the next day: for Christ's consecrated body is not changed, and the power of the blessing, and the life-giving grace is perpetually in it." Thus are all other consecrations irremovable so long as the consecrated things endure; on which account they are not repeated. And although the truth corresponds with the figure, still the figure cannot equal it.

Reply to Objection 3. The body of Christ remains in this sacrament not only until the morrow, but also in the future, so long as the sacramental species remain: and when they cease, Christ's body ceases to be under them, not because it depends on them, but because the relationship of Christ's body to those species is taken away, in the same way as God ceases to be the Lord of a creature which ceases to exist.


Whether the body of Christ, as it is in this sacrament, can be seen by any eye, at least by a glorified one?

Objection 1. It seems that the body of Christ, as it is in this sacrament, can be seen by the eye, at least by a glorified one. For our eyes are hindered from beholding Christ's body in this sacrament, on account of the sacramental species veiling it. But the glorified eye cannot be hindered by anything from seeing bodies as they are. Therefore, the glorified eye can see Christ's body as it is in this sacrament.

Objection 2. Further, the glorified bodies of the saints will be "made like to the body" of Christ's "glory," according to Philippians 3:21. But Christ's eye beholds Himself as He is in this sacrament. Therefore, for the same reason, every other glorified eye can see Him.

Objection 3. Further, in the resurrection the saints will be equal to the angels, according to Luke 20:36. But the angels see the body of Christ as it is in this sacrament, for even the devils are found to pay reverence thereto, and to fear it. Therefore, for like reason, the glorified eye can see Christ as He is in this sacrament.

On the contrary, As long as a thing remains the same, it cannot at the same time be seen by the same eye under diverse species. But the glorified eye sees Christ always, as He is in His own species, according to Isaiah 33:17: "(His eyes) shall see the king in his beauty." It seems, then, that it does not see Christ, as He is under the species of this sacrament.

I answer that, The eye is of two kinds, namely, the bodily eye properly so-called, and the intellectual eye, so-called by similitude. But Christ's body as it is in this sacrament cannot be seen by any bodily eye. First of all, because a body which is visible brings about an alteration in the medium, through its accidents. Now the accidents of Christ's body are in this sacrament by means of the substance; so that the accidents of Christ's body have no immediate relationship either to this sacrament or to adjacent bodies; consequently they do not act on the medium so as to be seen by any corporeal eye. Secondly, because, as stated above (Article 1, Reply to Objection 3; Article 3), Christ's body is substantially present in this sacrament. But substance, as such, is not visible to the bodily eye, nor does it come under any one of the senses, nor under the imagination, but solely under the intellect, whose object is "what a thing is" (De Anima iii). And therefore, properly speaking, Christ's body, according to the mode of being which it has in this sacrament, is perceptible neither by the sense nor by the imagination, but only by the intellect, which is called the spiritual eye.

Moreover it is perceived differently by different intellects. For since the way in which Christ is in this sacrament is entirely supernatural, it is visible in itself to a supernatural, i.e. the Divine, intellect, and consequently to a beatified intellect, of angel or of man, which, through the participated glory of the Divine intellect, sees all supernatural things in the vision of the Divine Essence. But it can be seen by a wayfarer through faith alone, like other supernatural things. And not even the angelic intellect of its own natural power is capable of beholding it; consequently the devils cannot by their intellect perceive Christ in this sacrament, except through faith, to which they do not pay willing assent; yet they are convinced of it from the evidence of signs, according to James 2:19: "The devils believe, and tremble."

Reply to Objection 1. Our bodily eye, on account of the sacramental species, is hindered from beholding the body of Christ underlying them, not merely as by way of veil (just as we are hindered from seeing what is covered with any corporeal veil), but also because Christ's body bears a relation to the medium surrounding this sacrament, not through its own accidents, but through the sacramental species.

Reply to Objection 2. Christ's own bodily eye sees Himself existing under the sacrament, yet it cannot see the way in which it exists under the sacrament, because that belongs to the intellect. But it is not the same with any other glorified eye, because Christ's eye is under this sacrament, in which no other glorified eye is conformed to it.

Reply to Objection 3. No angel, good or bad, can see anything with a bodily eye, but only with the mental eye. Hence there is no parallel reason, as is evident from what was said above.


Whether Christ's body is truly there when flesh or a child appears miraculously in this sacrament?

Objection 1. It seems that Christ's body is not truly there when flesh or a child appears miraculously in this sacrament. Because His body ceases to be under this sacrament when the sacramental species cease to be present, as stated above (Article 6). But when flesh or a child appears, the sacramental species cease to be present. Therefore Christ's body is not truly there.

Objection 2. Further, wherever Christ's body is, it is there either under its own species, or under those of the sacrament. But when such apparitions occur, it is evident that Christ is not present under His own species, because the entire Christ is contained in this sacrament, and He remains entire under the form in which He ascended to heaven: yet what appears miraculously in this sacrament is sometimes seen as a small particle of flesh, or at times as a small child. Now it is evident that He is not there under the sacramental species, which is that of bread or wine. Consequently, it seems that Christ's body is not there in any way.

Objection 3. Further, Christ's body begins to be in this sacrament by consecration and conversion, as was said above (III:75:2-4). But the flesh and blood which appear by miracle are not consecrated, nor are they converted into Christ's true body and blood. Therefore the body or the blood of Christ is not under those species.

On the contrary, When such apparition takes place, the same reverence is shown to it as was shown at first, which would not be done if Christ were not truly there, to Whom we show reverence of "latria." Therefore, when such apparition occurs, Christ is under the sacrament.

I answer that, Such apparition comes about in two ways, when occasionally in this sacrament flesh, or blood, or a child, is seen. Sometimes it happens on the part of the beholders, whose eyes are so affected as if they outwardly saw flesh, or blood, or a child, while no change takes place in the sacrament. And this seems to happen when to one person it is seen under the species of flesh or of a child, while to others it is seen as before under the species of bread; or when to the same individual it appears for an hour under the appearance of flesh or a child, and afterwards under the appearance of bread. Nor is there any deception there, as occurs in the feats of magicians, because such species is divinely formed in the eye in order to represent some truth, namely, for the purpose of showing that Christ's body is truly under this sacrament; just as Christ without deception appeared to the disciples who were going to Emmaus. For Augustine says (De Qq. Evang. ii) that "when our pretense is referred to some significance, it is not a lie, but a figure of the truth." And since in this way no change is made in the sacrament, it is manifest that, when such apparition occurs, Christ does not cease to be under this sacrament.

But it sometimes happens that such apparition comes about not merely by a change wrought in the beholders, but by an appearance which really exists outwardly. And this indeed is seen to happen when it is beheld by everyone under such an appearance, and it remains so not for an hour, but for a considerable time; and, in this case some think that it is the proper species of Christ's body. Nor does it matter that sometimes Christ's entire body is not seen there, but part of His flesh, or else that it is not seen in youthful guise, but in the semblance of a child, because it lies within the power of a glorified body for it to be seen by a non-glorified eye either entirely or in part, and under its own semblance or in strange guise, as will be said later (Supplement:85:2-3).

But this seems unlikely. First of all, because Christ's body under its proper species can be seen only in one place, wherein it is definitively contained. Hence since it is seen in its proper species, and is adored in heaven, it is not seen under its proper species in this sacrament. Secondly, because a glorified body, which appears at will, disappears when it wills after the apparition; thus it is related (Luke 24:31) that our Lord "vanished out of sight" of the disciples. But that which appears under the likeness of flesh in this sacrament, continues for a long time; indeed, one reads of its being sometimes enclosed, and, by order of many bishops, preserved in a pyx, which it would be wicked to think of Christ under His proper semblance.

Consequently, it remains to be said, that, while the dimensions remain the same as before, there is a miraculous change wrought in the other accidents, such as shape, color, and the rest, so that flesh, or blood, or a child, is seen. And, as was said already, this is not deception, because it is done "to represent the truth," namely, to show by this miraculous apparition that Christ's body and blood are truly in this sacrament. And thus it is clear that as the dimensions remain, which are the foundation of the other accidents, as we shall see later on (III:77:2, the body of Christ truly remains in this sacrament.

Reply to Objection 1. When such apparition takes place, the sacramental species sometimes continue entire in themselves; and sometimes only as to that which is principal, as was said above.

Reply to Objection 2. As stated above, during such apparitions Christ's proper semblance is not seen, but a species miraculously formed either in the eyes of the beholders, or in the sacramental dimensions themselves, as was said above.

Reply to Objection 3. The dimensions of the consecrated bread and wine continue, while a miraculous change is wrought in the other accidents, as stated above.

The Summa Theologiæ of St. Thomas AquinasSecond and Revised Edition, 1920Literally translated by Fathers of the English Dominican ProvinceOnline Edition Copyright © 2017 by Kevin Knight Nihil Obstat. F. Innocentius Apap, O.P., S.T.M., Censor. Theol.Imprimatur. Edus. Canonicus Surmont, Vicarius Generalis. Westmonasterii.APPROBATIO ORDINISNihil Obstat. F. Raphael Moss, O.P., S.T.L. and F. Leo Moore, O.P., S.T.L.Imprimatur. F. Beda Jarrett, O.P., S.T.L., A.M., Prior Provincialis AngliæMARIÆ IMMACULATÆ - SEDI SAPIENTIÆ

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Whether the accidents remain in this sacrament without a subject?

Objection 1. It seems that the accidents do not remain in this sacrament without a subject, because there ought not to be anything disorderly or deceitful in this sacrament of truth. But for accidents to be without a subject is contrary to the order which God established in nature; and furthermore it seems to savor of deceit, since accidents are naturally the signs of the nature of the subject. Therefore the accidents are not without a subject in this sacrament.

Objection 2. Further, not even by miracle can the definition of a thing be severed from it, or the definition of another thing be applied to it; for instance, that, while man remains a man, he can be an irrational animal. For it would follow that contradictories can exist at the one time: for the "definition of a thing is what its name expresses," as is said in Metaph. iv. But it belongs to the definition of an accident for it to be in a subject, while the definition of substance is that it must subsist of itself, and not in another. Therefore it cannot come to pass, even by miracle, that the accidents exist without a subject in this sacrament.

Objection 3. Further, an accident is individuated by its subject. If therefore the accidents remain in this sacrament without a subject, they will not be individual, but general, which is clearly false, because thus they would not be sensible, but merely intelligible.

Objection 4. Further, the accidents after the consecration of this sacrament do not obtain any composition. But before the consecration they were not composed either of matter and form, nor of existence [quo est] and essence [quod est]. Therefore, even after consecration they are not composite in either of these ways. But this is unreasonable, for thus they would be simpler than angels, whereas at the same time these accidents are perceptible to the senses. Therefore, in this sacrament the accidents do not remain without a subject.

On the contrary, Gregory says in an Easter Homily (Lanfranc, De Corp. et Sang. Dom. xx) that "the sacramental species are the names of those things which were there before, namely, of the bread and wine." Therefore since the substance of the bread and the wine does not remain, it seems that these species remain without a subject.

I answer that, The species of the bread and wine, which are perceived by our senses to remain in this sacrament after consecration, are not subjected in the substance of the bread and wine, for that does not remain, as stated above (III:75:2); nor in the substantial form, for that does not remain (III:75:6, and if it did remain, "it could not be a subject," as Boethius declares (De Trin. i). Furthermore it is manifest that these accidents are not subjected in the substance of Christ's body and blood, because the substance of the human body cannot in any way be affected by such accidents; nor is it possible for Christ's glorious and impassible body to be altered so as to receive these qualities.

Now there are some who say that they are in the surrounding atmosphere as in a subject. But even this cannot be: in the first place, because atmosphere is not susceptive of such accidents. Secondly, because these accidents are not where the atmosphere is, nay more, the atmosphere is displaced by the motion of these species. Thirdly, because accidents do not pass from subject to subject, so that the same identical accident which was first in one subject be afterwards in another; because an accident is individuated by the subject; hence it cannot come to pass for an accident remaining identically the same to be at one time in one subject, and at another time in another. Fourthly, since the atmosphere is not deprived of its own accidents, it would have at the one time its own accidents and others foreign to it. Nor can it be maintained that this is done miraculously in virtue of the consecration, because the words of consecration do not signify this, and they effect only what they signify.

Therefore it follows that the accidents continue in this sacrament without a subject. This can be done by Divine power: for since an effect depends more upon the first cause than on the second, God Who is the first cause both of substance and accident, can by His unlimited power preserve an accident in existence when the substance is withdrawn whereby it was preserved in existence as by its proper cause, just as without natural causes He can produce other effects of natural causes, even as He formed a human body in the Virgin's womb, "without the seed of man" (Hymn for Christmas, First Vespers).

Reply to Objection 1. There is nothing to hinder the common law of nature from ordaining a thing, the contrary of which is nevertheless ordained by a special privilege of grace, as is evident in the raising of the dead, and in the restoring of sight to the blind: even thus in human affairs, to some individuals some things are granted by special privilege which are outside the common law. And so, even though it be according to the common law of nature for an accident to be in a subject, still for a special reason, according to the order of grace, the accidents exist in this sacrament without a subject, on account of the reasons given above (III:75:5.

Reply to Objection 2. Since being is not a genus, then being cannot be of itself the essence of either substance or accident. Consequently, the definition of substance is not—"a being of itself without a subject," nor is the definition of accident—"a being in a subject"; but it belongs to the quiddity or essence of substance "to have existence not in a subject"; while it belongs to the quiddity or essence of accident "to have existence in a subject." But in this sacrament it is not in virtue of their essence that accidents are not in a subject, but through the Divine power sustaining them; and consequently they do not cease to be accidents, because neither is the definition of accident withdrawn from them, nor does the definition of substance apply to them.

Reply to Objection 3. These accidents acquired individual being in the substance of the bread and wine; and when this substance is changed into the body and blood of Christ, they remain in that individuated being which they possessed before, hence they are individual and sensible.

Reply to Objection 4. These accidents had no being of their own nor other accidents, so long as the substance of the bread and wine remained; but their subjects had "such" being through them, just as snow is "white" through whiteness. But after the consecration the accidents which remain have being; hence they are compounded of existence and essence, as was said of the angels, in I:50:2 ad 3; and besides they have composition of quantitative parts.


Whether in this sacrament the dimensive quantity of the bread or wine is the subject of the other accidents?

Objection 1. It seems that in this sacrament the dimensive quantity of the bread or wine is not the subject of the other accidents. For accident is not the subject of accident; because no form can be a subject, since to be a subject is a property of matter. But dimensive quantity is an accident. Therefore dimensive quantity cannot be the subject of the other accidents.

Objection 2. Further, just as quantity is individuated by substance, so also are the other accidents. If, then, the dimensive quantity of the bread or wine remains individuated according to the being it had before, in which it is preserved, for like reason the other accidents remain individuated according to the existence which they had before in the substance. Therefore they are not in dimensive quantity as in a subject, since every accident is individuated by its own subject.

Objection 3. Further, among the other accidents that remain, of the bread and wine, the senses perceive also rarity and density, which cannot be in dimensive quantity existing outside matter; because a thing is rare which has little matter under great dimensions. while a thing is dense which has much matter under small dimensions, as is said in Phys. iv. It does not seem, then, that dimensive quantity can be the subject of the accidents which remain in this sacrament.

Objection 4. Further, quantity abstract from matter seems to be mathematical quantity, which is not the subject of sensible qualities. Since, then, the remaining accidents in this sacrament are sensible, it seems that in this sacrament they cannot be subjected in the dimensive quantity of the bread and wine that remains after consecration.

On the contrary, Qualities are divisible only accidentally, that is, by reason of the subject. But the qualities remaining in this sacrament are divided by the division of dimensive quantity, as is evident through our senses. Therefore, dimensive quantity is the subject of the accidents which remain in this sacrament.

I answer that, It is necessary to say that the other accidents which remain in this sacrament are subjected in the dimensive quantity of the bread and wine that remains: first of all, because something having quantity and color and affected by other accidents is perceived by the senses; nor is sense deceived in such. Secondly, because the first disposition of matter is dimensive quantity, hence Plato also assigned "great" and "small" as the first differences of matter (Aristotle, Metaph. iv). And because the first subject is matter, the consequence is that all other accidents are related to their subject through the medium of dimensive quantity; just as the first subject of color is said to be the surface, on which account some have maintained that dimensions are the substances of bodies, as is said in Metaph. iii. And since, when the subject is withdrawn, the accidents remain according to the being which they had before, it follows that all accidents remain founded upon dimensive quantity.

Thirdly, because, since the subject is the principle of individuation of the accidents, it is necessary for what is admitted as the subject of some accidents to be somehow the principle of individuation: for it is of the very notion of an individual that it cannot be in several; and this happens in two ways. First, because it is not natural to it to be in any one; and in this way immaterial separated forms, subsisting of themselves, are also individuals of themselves. Secondly, because a form, be it substantial or accidental, is naturally in someone indeed, not in several, as this whiteness, which is in this body. As to the first, matter is the principle of individuation of all inherent forms, because, since these forms, considered in themselves, are naturally in something as in a subject, from the very fact that one of them is received in matter, which is not in another, it follows that neither can the form itself thus existing be in another. As to the second, it must be maintained that the principle of individuation is dimensive quantity. For that something is naturally in another one solely, is due to the fact that that other is undivided in itself, and distinct from all others. But it is on account of quantity that substance can be divided, as is said in Phys. i. And therefore dimensive quantity itself is a particular principle of individuation in forms of this kind, namely, inasmuch as forms numerically distinct are in different parts of the matter. Hence also dimensive quantity has of itself a kind of individuation, so that we can imagine several lines of the same species, differing in position, which is included in the notion of this quantity; for it belongs to dimension for it to be "quantity having position" (Aristotle, Categor. iv), and therefore dimensive quantity can be the subject of the other accidents, rather than the other way about.

Reply to Objection 1. One accident cannot of itself be the subject of another, because it does not exist of itself. But inasmuch as an accident is received in another thing, one is said to be the subject of the other, inasmuch as one is received in a subject through another, as the surface is said to be the subject of color. Hence when God makes an accident to exist of itself, it can also be of itself the subject of another.

Reply to Objection 2. The other accidents, even as they were in the substance of the bread, were individuated by means of dimensive quantity, as stated above. And therefore dimensive quantity is the subject of the other accidents remaining in this sacrament, rather than conversely.

Reply to Objection 3. Rarity and density are particular qualities accompanying bodies, by reason of their having much or little matter under dimensions; just as all other accidents likewise follow from the principles of substance. And consequently, as the accidents are preserved by Divine power when the substance is withdrawn, so, when matter is withdrawn, the qualities which go with matter, such as rarity and density, are preserved by Divine power.

Reply to Objection 4. Mathematical quantity abstracts not from intelligible matter, but from sensible matter, as is said in Metaph. vii. But matter is termed sensible because it underlies sensible qualities. And therefore it is manifest that the dimensive quantity, which remains in this sacrament without a subject, is not mathematical quantity.


Whether the species remaining in this sacrament can change external objects?

Objection 1. It seems that the species which remain in this sacrament cannot affect external objects. For it is proved in Phys. vii, that forms which are in matter are produced by forms that are in matter, but not from forms which are without matter, because like makes like. But the sacramental species are species without matter, since they remain without a subject, as is evident from what was said above (Article 1). Therefore they cannot affect other matter by producing any form in it.

Objection 2. Further, when the action of the principal agent ceases, then the action of the instrument must cease, as when the carpenter rests, the hammer is moved no longer. But all accidental forms act instrumentally in virtue of the substantial form as the principal agent. Therefore, since the substantial form of the bread and wine does not remain in this sacrament, as was shown above (III:75:6), it seems that the accidental forms which remain cannot act so as to change external matter.

Objection 3. Further, nothing acts outside its species, because an effect cannot surpass its cause. But all the sacramental species are accidents. Therefore they cannot change external matter, at least as to a substantial form.

On the contrary, If they could not change external bodies, they could not be felt; for a thing is felt from the senses being changed by a sensible thing, as is said in De Anima ii.

I answer that, Because everything acts in so far as it is an actual being, the consequence is that everything stands in the same relation to action as it does to being. Therefore, because, according to what was said above (Article 1), it is an effect of the Divine power that the sacramental species continue in the being which they had when the substance of the bread and wine was present, it follows that they continue in their action. Consequently they retain every action which they had while the substance of the bread and wine remained, now that the substance of the bread and wine has passed into the body and blood of Christ. Hence there is no doubt but that they can change external bodies.

Reply to Objection 1. The sacramental species, although they are forms existing without matter, still retain the same being which they had before in matter, and therefore as to their being they are like forms which are in matter.

Reply to Objection 2. The action of an accidental form depends upon the action of a substantial form in the same way as the being of accident depends upon the being of substance; and therefore, as it is an effect of Divine power that the sacramental species exist without substance, so is it an effect of Divine power that they can act without a substantial form, because every action of a substantial or accidental form depends upon God as the first agent.

Reply to Objection 3. The change which terminates in a substantial form is not effected by a substantial form directly, but by means of the active and passive qualities, which act in virtue of the substantial form. But by Divine power this instrumental energy is retained in the sacramental species, just as it was before: and consequently their action can be directed to a substantial form instrumentally, just in the same way as anything can act outside its species, not as by its own power, but by the power of the chief agent.


Whether the sacramental species can be corrupted?

Objection 1. It seems that the sacramental species cannot be corrupted, because corruption comes of the separation of the form from the matter. But the matter of the bread does not remain in this sacrament, as is clear from what was said above (III:75:2). Therefore these species cannot be corrupted.

Objection 2. Further, no form is corrupted except accidentally, that is, when its subject is corrupted; hence self-subsisting forms are incorruptible, as is seen in spiritual substances. But the sacramental species are forms without a subject. Therefore they cannot be corrupted.

Objection 3. Further, if they be corrupted, it will either be naturally or miraculously. But they cannot be corrupted naturally, because no subject of corruption can be assigned as remaining after the corruption has taken place. Neither can they be corrupted miraculously, because the miracles which occur in this sacrament take place in virtue of the consecration, whereby the sacramental species are preserved: and the same thing is not the cause of preservation and of corruption. Therefore, in no way can the sacramental species be corrupted.

On the contrary, We perceive by our senses that the consecrated hosts become putrefied and corrupted.

I answer that, Corruption is "movement from being into non-being" (Aristotle, Phys. v). Now it has been stated (Article 3) that the sacramental species retain the same being as they had before when the substance of the bread was present. Consequently, as the being of those accidents could be corrupted while the substance of the bread and wine was present, so likewise they can be corrupted now that the substance has passed away.

But such accidents could have been previously corrupted in two ways: in one way, of themselves; in another way, accidentally. They could be corrupted of themselves, as by alteration of the qualities, and increase or decrease of the quantity, not in the way in which increase or decrease is found only in animated bodies, such as the substances of the bread and wine are not, but by addition or division; for, as is said in Metaph. iii, one dimension is dissolved by division, and two dimensions result; while on the contrary, by addition, two dimensions become one. And in this way such accidents can be corrupted manifestly after consecration, because the dimensive quantity which remains can receive division and addition; and since it is the subject of sensible qualities, as stated above (Article 1), it can likewise be the subject of their alteration, for instance, if the color or the savor of the bread or wine be altered.

An accident can be corrupted in another way, through the corruption of its subject, and in this way also they can be corrupted after consecration; for although the subject does not remain, still the being which they had in the subject does remain, which being is proper, and suited to the subject. And therefore such being can be corrupted by a contrary agent, as the substance of the bread or wine was subject to corruption, and, moreover, was not corrupted except by a preceding alteration regarding the accidents.

Nevertheless, a distinction must be made between each of the aforesaid corruptions; because, when the body and the blood of Christ succeed in this sacrament to the substance of the bread and wine, if there be such change on the part of the accidents as would not have sufficed for the corruption of the bread and wine, then the body and blood of Christ do not cease to be under this sacrament on account of such change, whether the change be on the part of the quality, as for instance, when the color or the savor of the bread or wine is slightly modified; or on the part of the quantity, as when the bread or the wine is divided into such parts as to keep in them the nature of bread or of wine. But if the change be so great that the substance of the bread or wine would have been corrupted, then Christ's body and blood do not remain under this sacrament; and this either on the part of the qualities, as when the color, savor, and other qualities of the bread and wine are so altered as to be incompatible with the nature of bread or of wine; or else on the part of the quantity, as, for instance, if the bread be reduced to fine particles, or the wine divided into such tiny drops that the species of bread or wine no longer remain.

Reply to Objection 1. Since it belongs essentially to corruption to take away the being of a thing, in so far as the being of some form is in matter, it results that by corruption the form is separated from the matter. But if such being were not in matter, yet like such being as is in matter, it could be taken away by corruption, even where there is no matter; as takes place in this sacrament, as is evident from what was said above.

Reply to Objection 2. Although the sacramental species are forms not in matter, yet they have the being which they had in matter.

Reply to Objection 3. This corruption of species is not miraculous, but natural; nevertheless, it presupposes the miracle which is wrought in the consecration, namely, that those sacramental species retain without a subject, the same being as they had in a subject; just as a blind man, to whom sight is given miraculously, sees naturally.


Whether anything can be generated from the sacramental species?

Objection 1. It seems that nothing can be generated from the sacramental species: because, whatever is generated, is generated out of some matter: for nothing is generated out of nothing, although by creation something is made out of nothing. But there is no matter underlying the sacramental species except that of Christ's body, and that body is incorruptible. Therefore it seems that nothing can be generated from the sacramental species.

Objection 2. Further, things which are not of the same genus cannot spring from one another: thus a line is not made of whiteness. But accident and substance differ generically. Therefore, since the sacramental species are accidents, it seems that no substance can be generated from them.

Objection 3. Further, if any corporeal substance be generated from them, such substance will not be without accident. Therefore, if any corporeal substance be generated from the sacramental species, then substance and accident would be generated from accident, namely, two things from one, which is impossible. Consequently, it is impossible for any corporeal substance to be generated out of the sacramental species.

On the contrary, The senses are witness that something is generated out of the sacramental species, either ashes, if they be burned, worms if they putrefy, or dust if they be crushed.

I answer that, Since "the corruption of one thing is the generation of another" (De Gener. i), something must be generated necessarily from the sacramental species if they be corrupted, as stated above (Article 4); for they are not corrupted in such a way that they disappear altogether, as if reduced to nothing; on the contrary, something sensible manifestly succeeds to them.

Nevertheless, it is difficult to see how anything can be generated from them. For it is quite evident that nothing is generated out of the body and blood of Christ which are truly there, because these are incorruptible. But if the substance, or even the matter, of the bread and wine were to remain in this sacrament, then, as some have maintained, it would be easy to account for this sensible object which succeeds to them. But that supposition is false, as was stated above (III:75:2,4,8).

Hence it is that others have said that the things generated have not sprung from the sacramental species, but from the surrounding atmosphere. But this can be shown in many ways to be impossible. In the first place, because when a thing is generated from another, the latter at first appears changed and corrupted; whereas no alteration or corruption appeared previously in the adjacent atmosphere; hence the worms or ashes are not generated therefrom. Secondly, because the nature of the atmosphere is not such as to permit of such things being generated by such alterations. Thirdly, because it is possible for many consecrated hosts to be burned or putrefied; nor would it be possible for an earthen body, large enough to be generated from the atmosphere, unless a great and, in fact, exceedingly sensible condensation of the atmosphere took place. Fourthly, because the same thing can happen to the solid bodies surrounding them, such as iron or stone, which remain entire after the generation of the aforesaid things. Hence this opinion cannot stand, because it is opposed to what is manifest to our senses.

And therefore others have said that the substance of the bread and wine returns during the corruption of the species, and so from the returning substance of the bread and wine, ashes or worms or something of the kind are generated. But this explanation seems an impossible one. First of all, because if the substance of the bread and wine be converted into the body and blood of Christ, as was shown above (III:75:4), the substance of the bread and wine cannot return, except the body and blood of Christ be again changed back into the substance of bread and wine, which is impossible: thus if air be turned into fire, the air cannot return without the fire being again changed into air. But if the substance of bread or wine be annihilated, it cannot return again, because what lapses into nothing does not return numerically the same. Unless perchance it be said that the said substance returns, because God creates anew another new substance to replace the first. Secondly, this seems to be impossible, because no time can be assigned when the substance of the bread returns. For, from what was said above (Article 4; III:76:6 ad 3), it is evident that while the species of the bread and wine remain, there remain also the body and blood of Christ, which are not present together with the substance of the bread and wine in this sacrament, according to what was stated above (III:75:2). Hence the substance of the bread and wine cannot return while the sacramental species remain; nor, again, when these species pass away; because then the substance of the bread and wine would be without their proper accidents, which is impossible. Unless perchance it be said that in the last instant of the corruption of the species there returns (not, indeed, the substance of bread and wine, because it is in that very instant that they have the being of the substance generated from the species, but) the matter of the bread and wine; which, matter, properly speaking, would be more correctly described as created anew, than as returning. And in this sense the aforesaid position might be held.

However, since it does not seem reasonable to say that anything takes place miraculously in this sacrament, except in virtue of the consecration itself, which does not imply either creation or return of matter, it seems better to say that in the actual consecration it is miraculously bestowed on the dimensive quantity of the bread and wine to be the subject of subsequent forms. Now this is proper to matter; and therefore as a consequence everything which goes with matter is bestowed on dimensive quantity; and therefore everything which could be generated from the matter of bread or wine, if it were present, can be generated from the aforesaid dimensive quantity of the bread or wine, not, indeed, by a new miracle, but by virtue of the miracle which has already taken place.

Reply to Objection 1. Although no matter is there out of which a thing may be generated, nevertheless dimensive quantity supplies the place of matter, as stated above.

Reply to Objection 2. Those sacramental species are indeed accidents, yet they have the act and power of substance, as stated above (Article 3).

Reply to Objection 3. The dimensive quantity of the bread and wine retains its own nature, and receives miraculously the power and property of substance; and therefore it can pass to both, that is, into substance and dimension.