Verse 9. For after having spoken of the working or efficacy of Satan, he marks it out particularly when he says, in signs and lying wonders, and in all deceivableness. And assuredly, in order that this may be opposed to the kingdom of Christ, it must consist partly in false doctrine and errors, and partly in pretended miracles. For the kingdom of Christ consists of the doctrine of truth, and the power of the Spirit. Satan, accordingly, with the view of opposing Christ in the person of his Vicar, puts on Christ's mask, while he, nevertheless, at the same time chooses armor, with which he may directly oppose Christ. Christ, by the doctrine of his gospel, enlightens our minds in eternal life; Antichrist, trained up under Satan's tuition, by wicked doctrine, involves the wicked in ruin; Christ puts forth the power of his Spirit for salvation, and seals his gospel by miracles; the adversary, by the efficacy of Satan, alienates us from the Holy Spirit, and by his enchantments confirms miserable men in error.
He gives the name of miracles of falsehood, not merely to such as are falsely and deceptively contrived by cunning men with a view to impose upon the simple--a kind of deception with which all Papacy abounds, for they are a part of his power which he has previously touched upon; but takes falsehood as consisting in this, that Satan draws to a contrary end works which otherwise are truly works of God, and abuses miracles so as to obscure God's glory. In the mean time, however, there can be no doubt, that he deceives by means of enchantments--an example of which we have in Pharaoh's magicians.
Ver 11. The working of delusion. He means that errors will not merely have a place, but the wicked will be blinded, so that they will rush forward to ruin without consideration. For as God enlightens us inwardly by his Spirit, that his doctrine may be efficacious in us, and opens our eyes and hearts, that it may make its way thither, so by a righteous judgment he delivers over to a reprobate mind those whom he has appointed to destruction, that with closed eyes and a senseless mind, they may, as if bewitched, deliver themselves over to Satan and his ministers to be deceived. And assuredly we have a notable specimen of this in the Papacy. No words can express how monstrous a sink of errors there is there, how gross and shameful an absurdity of superstitions there is, and what delusions at variance with common sense. None that have even a moderate taste of sound doctrine, can think of such monstrous things without the greatest horror. How, then, could the whole world be lost in astonishment at them, were it not that men have been struck with blindness by the Lord, and converted, as it were, into stumps?