This is the Second American Edition of The Enlargement of the Heart, now published with invaluable indexes (of Scriptural References and of Names and Subjects). Already regarded as a classic, The Hidden Man of the Heart consists of a series of presentations on the place of the heart in the spiritual life of the Christian, with special reference to the writings of St. Silouan the Athonite (1866-1938) Elder Sophrony of Essex (1896-1993). Delivered in Wichita, Kansas at the 2007 Clergy Brotherhood Retreat of the Antiochian Orthodox Christian Church, each lecture is published here in full together with its corresponding Questions & Answers. The Hidden Man of the Heart is a companion volume to Fr. Zacharias' The Enlargement of the Heart.