Jean-Luc Marion is the Andrew Thomas Greeley and Grace McNichols Greeley Professor of Catholic Studies at the Divinity School of the University of Chicago, where he is also a member of the Committee on Social Thought and the Department of Philosophy. He is the author of several books published by the Press, including Negative Certainties and On Descartes' Passive Thought. Stephen E. Lewis is Professor of English at the Franciscan University of Steubenville. He has translated many books by Jean-Luc Marion, including The Erotic Phenomenon and Negative Certainties, also published by the University of Chicago Press.