Father Dennis Billy, a Redemptorist of the Baltimore Province, taught for more than twenty yearsat the Alphonsian Academy of Romes Pontifical Lateran University, reaching the rank of full (ordinary) professor. He is now scholar-in residence and holder of the John Cardinal Krol Chair of Moral Theology at St. Charles Borromeo Semnary in Overbrook, Pennsylvania. Father Billy is the author of numerous theological and spiritual books.