Fr. Dennis J. Billy, CSsR, is professor emeritus of the history of moral theology and Christian spirituality at the Alphonsian Academy of the Pontifical Lateran University in Rome and currently serves as the Karl Rahner Professor of Catholic Theology at the Graduate Theological Foundation in Mishawaka, IN. An American Redemptorist of the Baltimore Province, Fr. Billy has advanced degrees from Harvard University, the Pontifical University of St. Thomas (Angelicum), and the Graduate Theological Foundation. The author of numerous books and articles on a variety of religious topics, he is also active in his order's retreat apostolate and in the ministry of spiritual direction.