When I see young men doing so wonderfully well in athletics, I don't feel angry at them. I feel jealous of them. I wish that some of my boys in writing would do the same thing.... You must have form—performance. The thing itself is indescribable, but it is felt like athletic form. To have form, feel form in sports—and by analogy feel form in verse. One works and waits for form in both. As I said, the person who spends his time criticizing the play around him will never write poetry. He will write criticism.
Robert Frost (1874–1963), U.S. poet. Originally delivered at a poetry reading at Princeton University (October 26, 1937). "The Poet's Next of Kin in a College," Robert Frost: Poetry and Prose, Holt, Rinehart (1972).