Eusebius shews us the Emperor of Gaul anxiously debating within his own mind whether his forces were equal to the dangerous enterprise upon which he had embarked. Maxentius had a formidable army. He had also laboured to bring over to his side the powers of heaven and hell. Constantine’s information from Rome apprised him that Maxentius was assiduously employing all the black arts of magic and wizardry to gain the favour of the gods. And Constantine grew uneasy and apprehensive, for no one then disbelieved in the efficacy of magic, and he considered whether he might not counterbalance this undue advantage which Maxentius was obtaining by securing the protecting services of some equally potent deity. Such is the only possible meaning of Eusebius’s words, ἐννοεῖ δῆτα ὁποῖον δέοι θέον ἐπιγράψασθαι βοηθὸν—words which seem strange in the twentieth century, but were natural enough in the fourth. “He thought in his own mind what sort of god he ought to secure as ally.” And then, says his biographer, the idea occurred to him that though his predecessors in the purple had believed in a multiplicity of gods, the great majority of them had perished miserably. The gods, at whose altars they had offered rich sacrifice and plenteous libation, had deserted them in their hour of trouble, and had looked on unmoved while they and their families were exterminated from off the face of the earth, leaving scarcely so much as a name or a recollection behind them. The gods had cheated them and lured them to their doom with suave promises of treacherous oracles. Whereas, on the other hand, his father, Constantius, had believed in but one god, and had marvellously prospered throughout his life, helped and protected by this single deity who had showered every blessing upon his head. From such a contrast, what other deduction could be drawn than that the god of Constantius was the deity for Constantius’s son to honour? Constantine resolved that it would be folly to waste time or thought upon deities who were of no account (περὶ τούς μηδὲν ὄντας θεοὺς). He would worship no other god than the god of his father.