Joe Rigney (PhD, University of Chester) serves as a fellow of theology at New Saint Andrews College. He is a husband, a father of three, and the author of a number of books, including The Things of Earth; Strangely Bright; and More Than a Battle: How to Experience Victory, Freedom, and Healing from Lust.
John Piper is founder and lead teacher of desiringGod.org and chancellor of Bethlehem College & Seminary. He served for thirty-three years as a pastor at Bethlehem Baptist Church in Minneapolis, Minnesota, and is the author of more than fifty books, including Desiring God; Don't Waste Your Life; and Providence.