Surely we don't go to poetry for sarcasm or irony, for critical distance, learned dialectics or clever jokes. These worthy qualities and forms perform splendidly in their proper place––in an essay, a scholarly tract, a broadside in an opposition newspaper. In poetry, though, we seek the vision, the fire, the flame that accompanies spiritual revelation. In short, from poetry we expect poetry.
--Adam Zagajewski, from "The Shabby and the Sublime" in A Defense of Ardor: Essays
(Farrar, Straus and Giroux, 2004)