John Piper is founder and teacher of desiringGod.org and chancellor of Bethlehem College & 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 Expository Exultation: Christian Preaching as Worship.

Matt Chandler serves as lead pastor of teaching at The Village Church in the Dallas / Fort Worth metroplex. He is the author of Take Heart: Christian Courage in the Age of Unbelief.