Christian D. Kettler is Professor of Theology and Philosophy, Director of the Master of Arts in Christian Ministry program at Friends University in Wichita, Kansas, an ordained minister in the Presbyterian Church (USA), and Theologian in Residence at the Church of the Savior in Wichita. He is the author of The God Who Believes: Faith, Doubt, and the Vicarious Humanity of Christ (Cascade, 2005), The Vicarious Humanity of Christ and the Reality of Salvation (1991), and coeditor (with Todd H. Speidell) of Incarnational Ministry: The Presence of Christ in Church, Society, and Family: Essays in Honor of Ray S. Anderson (Wipf and Stock, 2009). Kettler earned his PhD under the supervision of Ray S. Anderson.