Send forth light squibs, no constant rays;
The world's whole sap is sunk;
The general balm th' hydroptic earth hath drunk,
Whither, as to the bed's feet, life is shrunk,
Dead and interr'd; yet all these seem to laugh,
Compar'd with me, who am their epitaph.
Study me then, you who shall lovers be
At the next world, that is, at the next spring;
For I am every dead thing,
In whom Love wrought new alchemy.
For his art did express
A quintessence even from nothingness,
From dull privations, and lean emptiness;
He ruin'd me, and I am re-begot
Of absence, darkness, death: things which are not.
All others, from all things, draw all that's good,
This line is short and emphatic, ending with a  caesura . It echoes line seven in the previous stanza in its sadness and negativity. 
 This is subtle, clever construction, attesting to Donne’s superb craftsmanship.
A Nocturnal Upon St. Lucys Day Being The Shortest Day