Douglas S. Huffman (PhD, Trinity Evangelical Divinity School) is Professor and Chair of Biblical and Theological Studies at Talbot School of Theology, Biola University, La Mirada, California. Huffman is author of The Handy Guide for New Testament Greek and Verbal Aspect Theory and the Prohibitions in the Greek New Testament, and he is editor of Christian Contours.

Eric L. Johnson (PhD, Michigan State University) is an associate professor of personality and pastoral theology at Southern Baptist Theological Seminary in Louisville, Kentucky. Johnson has written articles for the Journal of Psychology and Theology, Journal of Psychology and Christianity, Baker Encyclopedia of Psychology, and the Journal of Evangelical Theological Society.

Doug Geivett is a professor of philosophy at Talbot School of Theology, Biola University. Dr. Geivett served as the college pastor of a church in Washington and the Church of the Open Door in Southern California.

James Spiegel holds a PhD from Michigan State University and currently teaches philosophy at Taylor University. He is the author of several books, including the award-winning How to Be Good in a World Gone Bad. Spiegel is a frequent speaker at Christian colleges, conferences, churches, and on radio programs. He lives in Fairmount, Indiana, with his wife, Amy, and their four children, Bailey, Samuel, Magdalene, and Andrew.

William Lane Craig (PhD, University of Birmingham, England) is research professor of philosophy at Talbot School of Theology, Biola University and lives in Marietta, GA.

D. A. Carson (PhD, Cambridge University) is research professor of New Testament at Trinity Evangelical Divinity School in Deerfield, Illinois, where he has taught since 1978. He is co-founder (with Tim Keller) of the Gospel Coalition, and has written or edited nearly 60 books. He has served as a pastor and is an active guest lecturer in church and academic settings around the world.