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.

D. A. Carson (PhD, Cambridge University) is Emeritus Professor of New Testament at Trinity Evangelical Divinity School. He is a cofounder and theologian-at-large of the Gospel Coalition and has written and edited nearly two hundred books. He and his wife, Joy, have two children and live in the north suburbs of Chicago.

Owen Strachan (PhD, Trinity Evangelical Divinity School) is associate professor of Christian theology and director of the Theological and Cultural Engagement at Midwestern Baptist Theological Seminary. He also serves as president of the Council on Biblical Manhood and Womanhood.

David Mathis serves as senior teacher and executive editor at desiringGod.org; a pastor at Cities Church in Saint Paul, Minnesota; and an adjunct professor at Bethlehem College & Seminary in Minneapolis. He and his wife, Megan, have four children. He is the author of several books, including Habits of Grace: Enjoying Jesus through the Spiritual Disciplines.