Acts 19:15

"Jesus I know, and Paul I know." For, that there may not seem to be any slight put upon the Name of Jesus, the demon first confesses Him, and then has permission given him. For, to show that it was not any weakness of the Name, but all owing to the imposture of those men, why did not the same take place in the case of Paul? "They fled out of that house naked and wounded": he sorely battered their heads, perhaps rent their garments. "Jesus," says he, "I know," etc. Be ashamed, ye that are ignorant of Him. "And Paul I know." Well said, "Think not that it is because I despise them, that I do these things." Great was the fear of the demon. And why without these words did he not rend their garments? For so he would both have sated his wrath, and established the delusion. He feared as I said, the unapproachable force, and would not have had such power had he not said this.

"And there were seven sons of one Sceva, a Jew, and chief of the priests, which did so. And the evil spirit answered and said, Jesus I know, and Paul I know; but who are ye? And the man in whom the evil spirit was leaped on them, and overcame them, and prevailed against them, so that they fled out of that house naked and wounded." They did it in secret: then their impotence is publicly exposed. Then not the Name does anything, unless it be spoken with faith. See how they used their weapons against themselves! So far were they from thinking Jesus to be anything great: no, they must needs add Paul, as thinking him to be something great. Here one may marvel how it was that the demon did not cooperate with the imposture of the exorcists, but on the contrary exposed them, and laid open their stage-play. He seems to me to have done this in exceeding wrath: just as it might be, if a person being in uttermost peril, should be exposed by some pitiful creature, and wish to vent all his rage upon him.