John Ortberg is teaching pastor of Menlo Church and author of many books, including God Is Closer Than You Think.

Richard J. Foster (DThP, Fuller Theological Seminary) is founder of Renovaré in Denver, Colorado. He is the author of many books, including Celebration of Discipline: The Path to Spiritual Growth, which has sold over two million copies worldwide, Prayer: Finding the Heart's True Home, Freedom of Simplicity: Finding Harmony in a Complex World, and coauthor (with Gayle Beebe) of Longing for God: Seven Paths of Christian Devotion.

Gary W. Moon (PhD, Fuller Theological Seminary) is the founding director of the Martin Institute and Dallas Willard Center for Spiritual Formation at Westmont College in Santa Barbara, California. He continues to serve as the director of Conversatio Divina for the Martin Institute. He also serves as distinguished professor of psychology and Christian spirituality at Richmont Graduate University. He is the author of numerous books and curriculum resources including Apprenticeship with Jesus and Falling for God.