IN HELLENISTIC and Roman times Egypt was peculiarly productive of a distinctive variety of religious temperament, notably fervid in its emotionalism, markedly ascetic in its tendencies, and supremely desirous of the culminating experience of absorption into deity. During the Alexandrian period Egyptian mystics, acting under the charm of ancient religious tradition, asked for the privilege of initiation into the cult of Isis and sought in her ascetic discipline and in the impressiveness of her…