Scott Hahn is Professor of Theology and Scripture at the Franciscan University of Steubenville, in Steubenville, Ohio. He also holds the Chair of Biblical Theology and Liturgical Proclamation at St. Vincent Seminary in Latrobe, Pennsylvania. He is author of The Lamb's Supper, Lord Have Mercy; Swear to God: The Promise and Power of Sacraments; and Letter and Spirit: From Written Text of Living Word in the Liturgy.