Considered by many to be the final and crowning work of the patristic age, St John of Damascus' On the Orthodox Faith addresses all the major areas of Christian belief: Trinitarian theology, Christology, soteriology, the sacraments, the veneration of icons, saints, and relics, and much more. This new translation by Norman Russell includes a helpful introduction discussing the origin and reception of the text. This diglot edition, reproducing the critical Greek text on the facing page, is sure to become the standard and classic edition of this central and important patristic work.