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 Why I Love the Apostle Paul: 30 Reasons.

Matt Chandler is a lead pastor at The Village Church in DFW, president of the Acts 29 church planting network, and the author of An Even Better Christmas.