Gary Tyra (DMin, Fuller Theological Seminary) is professor of biblical and practical theology at Vanguard University of Southern California. An ordained minister with the Assemblies of God, he has served as the senior pastor for three churches over a twenty-seven-year period. Tyra now devotes his time to teaching, writing, and speaking. His books include Pursuing Moral Faithfulness: Ethics and Christian Discipleship and The Holy Spirit in Mission: Prophetic Speech and Action in Christian Witness. He lives in Yorba Linda, California.