Mike Cosper Author

Mike Cosper is the director of the Harbor Institute for Faith and Culture, where he works to create resources for Christians living in a post-Christian world. Prior to that, he was a founding pastor at Sojourn Community Church in Louisville, Kentucky, where he served for sixteen years as the pastor of worship and arts.

Timothy J. Keller is the founding pastor of Redeemer Presbyterian Church in New York. He is the best-selling author of The Prodigal God and The Reason for God. 

Collin Hansen (MDiv, Trinity Evangelical Divinity School) serves as vice president of content and editor in chief for the Gospel Coalition. He hosts the Gospelbound podcast and coauthored Gospelbound: Living with Resolute Hope in an Anxious Age. He serves as an elder for Redeemer Community Church in Birmingham, Alabama, and also on the advisory board of Beeson Divinity School. You can follow him on Twitter at @collinhansen.

Timothy J. Keller is the founding pastor of Redeemer Presbyterian Church in New York. He is the best-selling author of The Prodigal God and The Reason for God.