The Rev. Dr. Joel C. Elowsky (PhD, Drew University) is associate professor of historical theology at Concordia Seminary, St. Louis. He has served as the operations manager for the Ancient Christian Commentary on Scripture and has edited the two volumes on John's Gospel in that series. He is the volume editor for We Believe in the Holy Spirit in the Ancient Christian Doctrine series and has edited volumes on Theodore of Mopsuestia and Cyril of Alexandria in the Ancient Christian Texts series.