Grant R. Osborne (PhD, University of Aberdeen) is professor of New Testament at Trinity Evangelical Divinity School in Deerfield, Illinois. He has been at Trinity since 1977. His areas of expertise include the Gospels, hermeneutics, and the book of Revelation. His numerous publications include The Hermeneutical Spiral and commentaries on Revelation, Romans, John, and Matthew. Clinton E. Arnold (PhD, University of Aberdeen) is research professor of New Testament at Talbot School of Theology, Biola University in La Mirada, California. He has authored many books and commentaries, including Ephesians in the Zondervan Exegetical Commentary series and Acts in the Zondervan Illustrated Bible Backgrounds Commentary.