This book began as a series of classes that I gave to the monks at New Camaldoli Hermitage, Big Sur, California. The monks encouraged me to publish the material. Later when I was teaching a course on the New Testament at the School for Deacons in Berkeley, I remarked that every preacher should preach on sin at least twice a year. My students seemed surprised and intrigued and asked me to explain. I attempted to do so briefly, but the explanation was not adequate. Later another member of the faculty heard that I thought that deacons should at least occasionally preach on sin, and she was horrified. Apparently she thought, as I also do, that many sermons on sin are destructive, even sinful! This book is a longer and, I hope, more satisfacto...