How does John Donne use imagery in A Valediction: Forbidden Mourning?

The first two stanzas argue that the speaker and his love should separate quietly—as quietly as righteous men go to their deaths—because their love is sacred and should not be profaned by public emotional displays. The next three stanzas consider the holy nature of their love, contrasting it with ordinary lovers who base their relationship solely on sexual attraction. The final four stanzas imaginatively consider the ways in which the lovers' souls will remain joined even during their physical separation.