Galatians 3:5

"So then, the One who provides you with." He says that the One providing, the Spirit of God, is present among you and working, that is, producing powers of signs in you, doing these things on account of the works from the law; he says, …

After confirming that they have suffered and consequently that the Spirit has been given to them, he rightly goes on to ask whether God worked virtues in them from the works of the law or from the hearing of faith. "Obviously not from works," [he …

(Verse 5.) So then, does he who supplies the Spirit to you and works miracles among you do so by works of the law, or by hearing with faith? Not that the works of the Law should be despised, and without them a simple faith should be sought; but that the works themselves may be adorned by the faith of Christ. For that saying of the wise man is well known, 'The just shall live by faith, not by righteousness.' At the same time it is shown that the Galatians, after receiving the Holy Spirit by faith, had the gifts of virtues, that is, prophecy, kinds of tongues, healings, and other things that are enumerated in the spiritual gifts to the Corinthians (1 Cor. VII). And yet, after so many (because perhaps they did not have the grace of discerning spirits), they were ensnared by false teachers. It should also be noted that they claim to work miracles in those who do not hold the truth of the Gospel: just as in those who, not following the Lord, were performing miracles in His name, with John in particular complaining: Teacher, we saw someone driving out demons in Your name, and we tried to stop him because he does not accompany us (Mark 9:37). Against heretics who believe that the proof of their faith consists in performing some miracle. Those who eat and drink in the name of the Lord (for they also have a sacrilegious altar) and boast of having performed many signs, calling upon the Savior, will deserve to hear on the day of judgment: 'I never knew you, depart from me, you workers of iniquity' (Matthew 7:23).

Have ye been vouchsafed, he says, so great a gift, and achieved such wonders, because ye observed the Law, or because ye adhered to Faith? plainly on account of Faith. Seeing that they played this argument to and fro, that apart from the Law, Faith had no force, he proves the contrary, viz., that if the Commandments be added, Faith no longer avails; for Faith then has efficacy when things from the Law are not added to it. "Ye who would be justified by the Law, ye are fallen away from grace:" This he says later, when his language has grown bolder, employing the vantage-ground by that time gained; meanwhile while gaining it, he argues from their past experience. For it was when ye obeyed Faith, he says, not the Law, that ye received the Spirit and wrought miracles. And here, as the Law was the subject of discussion, he moots another special point of controversy, and very opportunely and with much cogency introduces a notice of Abraham.

Then when he says, "He, therefore, who giveth to you the Spirit and worketh miracles among you; doth he do it by the works of the law or by the hearing of the faith?" he proves his proposition by appealing to his own experience. For …