John H. Armstrong is president of ACT 3 in Carol Stream, Illinois and served as a pastor for more than twenty years. He is an adjunct professor of evangelism at Wheaton College Graduate School. His online commentaries regularly appear at www.Act3online.com. He holds degrees from Wheaton College, Wheaton Graduate School, and Luther Rice Seminary. He is the author or editor of a number of books including The Catholic Mystery, Five Great Evangelists, Understanding Four Views on the Lords Supper, and Understanding Four Views on Baptism
Paul E. Engle, series editor for Counterpoints Church Life, is an ordained minister who served for twenty-two years in pastoral ministry in Pennsylvania, Connecticut, Illinois, and Michigan. He is an adjunct teacher in several seminaries in this country and internationally. He serves as associate publisher and executive editor in the Church, Academic, and Ministry Resources team at Zondervan. He and his wife Margie, live in Grand Rapids, Michigan.