John Piper is founder and teacher of Desiring God and chancellor of Bethlehem College and Seminary. For 33 years, he served as pastor of Bethlehem Baptist Church, Minneapolis, Minnesota. He is author of more than 50 books, including Desiring God: Meditations of a Christian Hedonist and most recently Foundations for Lifelong Learning: Education in Serious Joy.

Douglas Wilson is pastor of Christ Church in Moscow, Idaho, and the writer of numerous books, including Same-Sex Mirage: Phantasmagoria at the Altar & Some Biblical Responses.