John D. Rempel (ThD, Toronto School of Theology) is senior fellow at the Toronto Mennonite Theological Centre at the Toronto School of Theology. He is the author of The Lord's Supper in Anabaptism, the editor of Joerg Maler's Kunstbuch: Writings of the Pilgram Marpeck Circle, and the coeditor of The Fragmentation of the Church and Its Unity in Peacemaking.

Gordon T. Smith is the president of Ambrose University and Seminary in Calgary, Alberta, where he also serves as professor of systematic and spiritual theology. He is an ordained minister with the Christian and Missionary Alliance and a teaching fellow at Regent College, Vancouver, British Columbia. He is the author of many books, including Institutional Intelligence, Called to Be Saints, and Your Calling Here and Now.