Tim Muehlhoff (PhD, University of North Carolina, Chapel Hill) is professor of communication at Biola University in La Mirada, California, where he teaches classes in family communication, interpersonal communication, persuasion, and gender. Tim is senior director of the Winsome Conviction Project. His books include I Beg to Differ, Eyes to See, and Winsome Persuasion.
Clinton Arnold earned his PhD at the University of Aberdeen in Scotland and has done post-doctoral work at Eberhard-Karls-Universität Tübingen in Germany. He is currently research professor of New Testament at the Talbot School of Theology in La Mirada, California.