Only fragments of the writings of the Gnostic teacher Heracleon, a disciple of Valentinus who flourished around 145-180 A.D, survive and primarily in quotations in Origen's commentary on the Gospel of Saint John. This book gives an edition of the surviving texts with extensive notes, biblical references, and indices.TEXTS AND STUDIES is a series of monographs devoted to the study of Biblical and patristic texts. Maintaining the highest scholarly standards, the series includes critical editions, studies of primary sources, and analyses of textual traditions.