Junior Research Fellow in Theology, Dr. Simeon Zahl is Junior Research Fellow in Theology at St. Johns College, Oxford. His research interests are in the broad Protestant tradition, especially the doctrine of the Holy Spirit, Lutheran theology, theologies of emotion, and charismatic and Pentecostal theologies. My first book was on German Pietist theologian Christoph Blumhardt (1842-1919), a bridge figure between classical Reformation thought and contemporary Pentecostalism.