Clark H. Pinnock (PhD, University of Manchester) is professor emeritus of systematic theology at McMaster Divinity College in Hamilton, Ontario, and has written or edited eighteen books, including Most Moved Mover. Barry L. Callen (DRel, Chicago Theological Seminary) is University Professor Emeritus of Christian Studies at Anderson University in Anderson, Indiana. He is editor of the Wesleyan Theological Journal and author or editor of over twenty books, including Authentic Spirituality.