Of joy, a Teare.
The opening of a stanza with two lines which in thought belong to the previous one is not unprecedented in Donne's poems. Compare the sixth stanza of A Valediction: of my name in the window, and note.
Dryden has borrowed this image—like many another of Donne's:
Muse down again precipitate thy flight;
For how can mortal eyes sustain immortal light?
But as the sun in water we can bear,
Yet not the sun, but his reflection there,
So let us view her here in what she was,
And take her image in this watery glass.