Blind since early childhood, the Egyptian theologian and monk Didymus (ca. 313-398) wielded a masterful knowledge of Scripture, philosophy, and previous biblical interpretation, earning the esteem of his contemporaries Athanasius, Antony of Egypt, Jerome, Rufinus, and Palladius, as well as of the historians Socrates and Theodoret in the decades following his death. He was, however, anathematized by the Fifth Ecumenical Council in 553 because of his...