Now these things said by us are not merely words but have the witness of their truth from experience itself. Let him who wishes come up and behold the proof of virtue in the virgins of Christ and in the youth who live a pure life in chastity, and the belief in immortality in so great a company of martyrs.
And let him come who wishes to put to test what has been said, and in front of the illusions of the demons and the deceit of the oracles, and the wonders of magic, let him use the sign of the cross, which is mocked by them, merely naming Christ, and he will see how by it demons are put to flight, oracles cease, and all magic and witchcraft are brought to naught.
Who, then, and how great is this Christ, who by His naming and presence overshadows and brings to naught everything everywhere, and who is alone powerful over all, and has filled the whole inhabited world with His teaching?
+St. Athanasius: On the Incarnation
