Contents: What is Mysticism; The Mystical Element in the Gospel and Epistles; The Montanists, The Gnostics, and the Alexandrines; Neo-Platonism; The Influence of Neo-Platonism in Christianity; Three Types of Medieval Mysticism; The German Mystics of the Middle Ages; English, Italian, Spanish, and French Mystics; Post Reformation Mysticism in England; Puritan Mystics; Jacob Boehme and William Law; Modern Mysticism; Bibliography, Index.