O, my America, my Newfoundland,
My kingdom, safest when with one man mann'd,
My mine of precious stones, my empery;
How am I blest in thus discovering thee!
To enter in these bonds, is to be free;
Then, where my hand is set, my seal shall be.
Full nakedness! All joys are due to thee;
As souls unbodied, bodies unclothed must be
To taste whole joys. Gems which you women use
Are like Atlanta's ball cast in men's views;
That, when a fool's eye lighteth on a gem,
His earthly soul might court that, not them.
Like pictures, or like books' gay coverings made
For laymen, are all women thus array'd.
Themselves are only mystic books, which we
—Whom their imputed grace will dignify—
The reference to books and pictures reflects the learning and thirst for knowledge that characterised the society in which Donne moved.  Note that books in Donne’s time were often bound in showy covers, replete with gold and gems.
To His Mistress Going to Bed