The most prominent Christian theologian and exegete of the third century, Origen was also an influential teacher. In the famed <I>Thanksgiving Address</I>, one of his students—traditionally thought to be Gregory Thaumaturgus, later bishop of Cappadocia—delivered an emotionally charged account of his tutelage under Origen in Roman Palestine. Although it is one of the few personal narratives by a Christian author to have survived from the period,...