Douglas Groothuis is professor of philosophy at Denver Seminary. Groothuis was a campus pastor for twelve years prior to obtaining a position as an associate professor of philosophy of religion and ethics at Denver Seminary in 1993.

Tony Reinke serves as Senior Teacher for Desiring God, host of the Ask Pastor John podcast, and author of Ask Pastor John: 750 Bible Answers to Life’s Most Important Questions (2024). He and his wife live in Phoenix.

David Wells is distinguished senior research professor at Gordon-Conwell Theological Seminary, and the author of numerous books.