Fr. Dennis J. Billy, C.Ss.R., holds the John Cardinal Krol Chair of Moral Theology at St. Charles Borromeo Seminary in Wynnewood, Pennsylvania. He earned a ThD in church history from Harvard, an STD in spirituality from The Pontifical University of St. Thomas, and a DMin in spiritual direction from the Graduate Theological Foundation. He was a professor of moral theology and Christian spirituality at the Alphonsian Academy in Rome for more than 20 years and has written or edited more than 25 books and numerous articles.