4 But already some of the most faithful women, possessed of the fear of God, and not being deceived (whom, nevertheless, he did his best to seduce like the rest by bidding them prophesy), abhorring and execrating him, have withdrawn from such a vile company of revellers. This they have done, as being well aware that the gift of prophecy is not conferred on men by Marcus, the magician, but that only those to whom God sends His grace from above possess the divinely-bestowed power of prophesying; and then they speak where and when God pleases, and not when Marcus orders them to do so.
For that which commands is greater and of higher authority than that which is commanded, inasmuch as the former rules, while the latter is in a state of subjection. If, then, Marcus, or any one else, does command—as these are accustomed continually at their feasts to play at drawing lots, and [in accordance with the lot] to command one another to prophesy, giving forth as oracles what is in harmony with their own desires—it will follow that he who commands is greater and of higher authority than the prophetic spirit, though he is but a man, which is impossible.
But such spirits as are commanded by these men, and speak when they desire it, are earthly and weak, audacious and impudent, sent forth by Satan for the seduction and perdition of those who do not hold fast that well-compacted faith which they received at first through the Church.
Source: Adversus haereses (New Advent)