Joyce Ann Zimmerman, C.PP.S., Ph.D., S.T.D., is the editor of Liturgical Ministry. Published by Liturgical Press. John M. Huels is professor of canon law at Saint Paul University in Ottawa Michael G. Lawler, Ph.D., is the Amelia and Emil Graff Distinguished Professor of Catholic Thought at Creighton University, Omaha, Nebraska. Deacon William T. Ditewig, Ph.D., is the executive director of the Secretariat for the Diaconate at the United States Conference of Catholic Bishops, Washington, D.C. Sharon M. McMillan, S.N.D.de N., S.L.D., is an associate professor of sacramental theology and liturgy at St. Patrick's Seminary, Menlo Park, California.