In another poem this author told the addressee that "thy firmness makes my circle just /  and makes me end, where I begun.
This man asked "Who would believe me, if I swear / That I have had the plague a year" in one poem and noted that he was a "little world made cunningly of elements" in another. Aside from writing "The Broken Heart," this poet noted that the title figure "suck'd me first, and now sucks thee" in a poem that uses being bitten by an insect as a euphemism for sex. In another poem this author told the addressee that "thy firmness makes my circle just /  and makes me end, where I begun." That work is "A Valediction: Forbidding Mourning." For 10 points, name this Metaphysical poet famous for lines like "Death, be not proud," "No man is an island," and "Therefore, send not to know for whom the bell tolls, it tolls for thee."
This man asked "Who would believe me, if I swear / That I have had the plague a year" in one poem and noted that he was a "little world made cunningly of elements" in another.
John Donne