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 Providence.

Sinclair Ferguson is a Ligonier teaching fellow and Chancellor’s Professor of Systematic Theology, Reformed Theological Seminary.

Greg Livingstone is senior associate for missions advancement of World Outreach for the Evangelical Presbyterian Church.

Tom Steller is pastor for leadership development at Bethlehem Baptist Church in Minneapolis, and senior advisor to the president and dean of global and alumni outreach at Bethlehem College & Seminary.