Arnold's research interest is in the Pauline writings, the book of Acts, Graeco-Roman religions, the rise of Christianity in Asia Minor, and the theology of sanctification (including modern-day exorcism and spiritual warfare).
[1] He has authored six books, dozens of scholarly articles, and several entries in biblical dictionaries and study Bibles.
In the past, he served as a regular columnist for Discipleship Journal, and is the general editor of the Zondervan Exegetical Commentary Series.
(1983) from the related Talbot Theological Seminary, and his Ph.D. (1986) in New Testament exegesis at the University of Aberdeen.
In 1991, he completed post-doctoral studies in the historical context of the epistle to the Colossians at Eberhard Karls Universität Tübingen.