Eusebius, in his turn, displays a number of excellent reasons to prove that oracles could be nothing but impostures; and if he attributes them to demons, it is the result of deplorable prejudices or of an affected respect for general opinion. The pagans would never admit that their oracles were merely the artifices of their priests; it was imagined therefore, by rather an awkward process of reasoning, that a little was gained in the dispute by admitting the possibility, that there might be something supernatural in their oracles, and insisting at the same time, that if there were, it was the operation, not of the deity, but of demons.
It is no longer necessary now, in order to expose the finesse and stratagems of priests, to resort to means which might themselves appear too strongly marked by those qualities. A time has already been when they were completely exhibited to the eyes of the whole world--the time, I mean when the Christian religion proudly triumphed over paganism under Christian emperors.
Theodoret says that Theophilus, bishop of Alexandria, exhibited to the inhabitants of that city the hollow statues into which the priests entered, from secret passages, to deliver the oracles. When, by Constantine's order, the temple of Æsculapius at Ægea, in Cilicia, was pulled down, there was driven out of it, says Eusebius in his life of that emperor, not a god, nor a demon, but the human impostor who had so long duped the credulity of nations. To this he adds the general observation that, in the statues of the gods that were thrown down, not the slightest appearance was found of gods, or demons, or even any wretched and gloomy spectres, but only hay, straw, or the bones of the dead.
The greatest difficulty respecting oracles is surmounted, when it is ascertained and admitted, that demons had no concern with them. There is no longer any reason why they should cease precisely at the coming of Jesus Christ. And moreover, there are many proofs that oracles continued more than four hundred years after Jesus Christ, and that they were not totally silenced but by the total destruction of paganism.
Suetonius, in the life of Nero, says the oracle of Delphi warned that emperor to be aware of seventy-three years, and that Nero concluded he was to die at that age, never thinking upon old Galba, who, at the age of seventy-three, deprived him of the empire.