St. Augustine (354-430), greatest of the Church Fathers, continues to exercise a unique and profound influence upon the intellectual history of the West after more than fifteen hundred years. Pioneer in the theology of Grace and in a psychological understanding of the Trinity, his impact upon subsequent theological speculation, Protestant as well as Catholic, has been unrivaled. The timeless and timely character of his teaching is perhaps nowhere more apparent than in the documents of the Second Vatican Council where the African Bishop is cited more frequently than any other Father or Doctor...