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.

Jason DeRouchie serves as professor of Old Testament and biblical theology at Bethlehem College & Seminary in Minneapolis, Minnesota. In August, he will assume the post of research professor of Old Testament and biblical theology at Midwestern Baptist Theological Seminary in Kansas City, Missouri.

Ryan Griffith is Director of Global Training at The Gospel Coalition.

Joe Rigney is assistant professor of theology and literature at Bethlehem College & Seminary and author of The Things of Earth: Treasuring God by Enjoying His Gifts. He is a pastor at Cities Church.

Sam Storms is lead pastor for preaching and vision at Bridgeway Church in Oklahoma City, Oklahoma, and also serves on the Board of Directors of Desiring God. His latest book is Practicing the Power: Welcoming the Gifts of the Holy Spirit in Your Life.