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 Foundations for Lifelong Learning: Education in Serious Joy.

Kent Hughes was a pastor for 41 years, the last 27 as senior pastor of College Church in Wheaton. He continues to be involved in training pastors in biblical exposition and preaching.

Tope Koleoso serves Jubilee Church in London.

Jason Meyer served for eight years as pastor for preaching and vision at Bethlehem Baptist Church. He’s the author of Don't Lose Heart: Gospel Hope for the Discouraged Soul. He and his wife, Cara, have four children.

Darrin Patrick is pastor of The Journey Church in St. Louis, Missouri, and author of The Dude’s Guide to Manhood: Finding True Manliness in a World Full of Counterfeits.

Mack Stiles formerly served as Senior Pastor of the Erbil International Church. He’s the author of Evangelism: How the Whole Church Speaks of Jesus.