'The Proof' by Richard Wilbur: From The Atlantic Archives

Throughout April, as a celebration of National Poetry Month, we're highlighting the work of Richard Wilbur, the former national poet laureate who turned 90 earlier this year. Today's selection is "The Proof," which first appeared in the March 1964 issue of The Atlantic.

Read "The Proof" by Richard Wilbur.

See all of The Atlantic's Richard Wilbur coverage.