Acts 16:17

What may be the reason that both the demon spoke these words, and Paul forbade him? Both the one acted maliciously, and the other wisely: the demon wished in fact to make himself credible. For if Paul had admitted his testimony, he would have deceived many of the believers, as being received by him: therefore he endures to speak what made against himself, that he may establish what made for himself: and so the demon himself uses accommodation in order to destruction. O thou accursed, thou execrable one! if then thou knowest that it is "His way of salvation" that "they show," why dost thou not come out freely? But just what Simon wished, when he said, "Give me, that on whomsoever I lay my hands, he may receive the Holy Ghost", the same did this demon: since he saw them becoming famous, here also he plays the hypocrite: by this means he thought to be allowed to remain in the body, if he should preach the same things. But if Christ "receive not testimony from man," meaning John, much less from a demon. "Praise is not comely in the mouth of a sinner", much less from a demon. For that they preach is not of men, but of the Holy Ghost. Because they did not act in a spirit of boasting.