De Sales' classic has been described as "a masterpiece of psychology, practical morality, and common sense" and, after The Bible and The Imitation of Christ, is the widest read spiritual book of all time. Unlike many others, Devout Life was written specifically for lay persons and it demonstrates a rare sensitivity to the demands of life in a world that is often antagonistic to spirituality. In this first-of-its-kind edition, Fr. John-Julian offers a fresh translation, a most thorough historical introduction, and notes explaining points of language and theology along the way.