Acts 13:11

"And now, behold, the hand of the Lord is upon thee, and thou shalt be blind." It was the sign by which he was himself converted, and by this he would fain convert this man. As also that expression, "for a season," puts it not as an act of punishing, but as meant for his conversion: had it been for punishment, he would have made him lastingly blind, but now it is not so, but "for a season" (and this), that he may gain the proconsul. For, as he was prepossessed by the sorcery, it was well to teach him a lesson by this infliction (and the sorcerer also), in the same way as the magicians (in Egypt) were taught by the boils. "And immediately there fell on him a mist and a darkness: and he went about seeking some to lead him by the hand."

"And now behold the hand of the Lord is upon thee." It was not vengeance then, but healing: for it is as though he said: "It is not I that do it, but the hand of God." Mark how unassuming! No "light," as in the case of Paul, "shone round about him." "Thou shalt be blind," he says, "not seeing the sun for a season," that he may give him opportunity for repentance: for we nowhere find them wishing to be made conspicuous by the more stern (exercise of their authority), even though it was against enemies that this was put forth: in respect of those of their own body (they used severity), and with good reason, but in dealing with those without, not so; that (the obedience of faith) might not seem to be matter of compulsion and fear. It is a proof of his blindness, his "seeking some to lead him by the hand."

He first convicted the sorcerer (and showed), what he was; and that he was such, the sign showed: "thou shalt be blind, not seeing the sun" this was a sign of the blindness of his soul: "for a season": he says, to bring him to repentance.