Dumitru Staniloae is considered one of the most significant Orthodox theologians of the 20th century. Even before Vladimir Lossky and John Meyendorff, he rediscovered the mystical theology of the ascetic Fathers and, in contrast to the orthodox "school theology" of his time, renewed the theology of experience. As an opponent of the regime during the time of communism, he spent several years in political imprisonment. In addition to the most extensive translation and edition of the Fathers' texts on spirituality, asceticism, and mysticism in the Eastern Church, Staniloae also presented an extremely creative overall design for Orthodox theology. This volume portrays the life and work of this exceptional theologian and explores the central themes of his theology.