Tim Challies is founder and author of the popular Christian blog Challies.com. Tim is a pastor at Grace Fellowship Church in Toronto, Ontario, and co-founder of Cruciform Press. He is author of The Discipline of Spiritual Discernment, Sexual Detox: A Guide for Guys Who Are Sick of Porn, and The Next Story: Life and Faith After the Digital Explosion.
W. Robert Godfrey
Dr. W. Robert Godfrey is a Ligonier Ministries teaching fellow and chairman of Ligonier Ministries. He is president emeritus and professor emeritus of church history at Westminster Seminary California. He is the featured teacher for the six-part Ligonier teaching series A Survey of Church History. His many books include God’s Pattern for Creation, Reformation Sketches, An Unexpected Journey, Learning to Love the Psalms, and Saving the Reformation.
Dr. Steven J. Lawson is founder and president of OnePassion Ministries. He is a Ligonier Ministries teaching fellow, director of the doctor of ministry program at The Master’s Seminary, and host of the Institute for Expository Preaching. He has written numerous books, including The Passionate Preaching of Martyn Lloyd-Jones, The Evangelistic Zeal of George Whitefield, John Knox: Fearless Faith, and The Moment of Truth. He is on Twitter @DrStevenJLawson.
Dr. R. Albert Mohler Jr. is president and Joseph Emerson Brown Professor of Christian Theology at The Southern Baptist Theological Seminary in Louisville, Ky. He is host of the daily program The Briefing and blogs at AlbertMohler.com. He is author of numerous books, including Culture Shift, Atheism Remix, We Cannot Be Silent and The Prayer That Turns the World Upside Down. He is on Twitter @AlbertMohler.
Dr. Stephen J. Nichols is president of Reformation Bible College, chief academic officer for Ligonier Ministries, and a Ligonier Ministries teaching fellow. He is host of the podcasts 5 Minutes in Church History and Open Book. He is author of numerous books, including For Us and for Our Salvation, Peace, A Time for Confidence, 5 Minutes in Church History, and volumes in the Guided Tour series on Jonathan Edwards, Martin Luther, and J. Gresham Machen. He is coeditor of The Legacy of Luther and Crossway’s Theologians on the Christian Life series. He is on Twitter at @DrSteveNichols.