What is the main conflict in A Valediction: Forbidden Mourning by John Donne?

"A Valediction: Forbidding Mourning" shows many features associated with seventeenth-century metaphysical poetry in general, and with Donne's work in particular. Donne's contemporary, the English writer Izaak Walton, tells us the poem dates from 1611, when Donne, about to travel to France and Germany, wrote for his wife this valediction, or farewell speech. Like most poetry of Donne's time, it did not appear in print during the poet's lifetime. The poem was first published in 1633, two years after Donne's death, in a collection of his poems called Songs and Sonnets. Even during his life, however, Donne's poetry became well known because it circulated privately in manuscript and handwritten copies among literate Londoners.