Jean-Luc Marion is professor of philosophy at the University of Paris-Sorbonne Paris IV, and the John Nuveen Distinguished Professor in the Divinity School and professor in the Committee on Social Thought and the Department of Philosophy at the University of Chicago. He is the author of several books, including On Descartes' Metaphysical Prism, also published by the University of Chicago Press. Stephen E. Lewis is assistant professor of English at the Franciscan University of Steubenville. He is the translator of Jean-Luc Marion's Prolegomena to Charity and Jean-Louis Chretien's Hand to Hand: Listening to the Work of Art.