The apostle is here dealing with those who, having embraced the faith of Christ, still continued to seek for justification by the works of the law; that is, who depended upon their own obedience to the moral precepts as their righteousness before God, and, wherein that was defective, had recourse to the legal sacrifices and purifications to make it up. These he first sharply reproves, and then endeavours, by the evidence of truth, to convince them. This is the right method, when we reprove any for a fault or an error, to convince them that it is an error, that it is a fault.

He reproves them, and the reproof is very close and warm: he calls them foolish Galatians, Gal 3:1. Though as Christians they were Wisdom's children, yet as corrupt Christians they were foolish children. Yea, he asks, Who hath bewitched you? whereby he represents them as enchanted by the arts and snares of their seducing teachers, and so far deluded as to act very unlike themselves. That wherein their folly and infatuation appeared was that they did not obey the truth; that is, they did not adhere to the gospel way of justification, wherein they had been taught, and which they had professed to embrace. Note, It is not enough to know the truth, and to say we believe it, but we must obey it too; we must heartily submit to it, and stedfastly abide by it. Note, also, Those are spiritually bewitched who, when the truth as it is in Jesus is plainly set before them, will not thus obey it. Several things proved and aggravated the folly of these Christians.

1.Jesus Christ had been evidently set forth as crucified among them; that is, they had had the doctrine of the cross preached to them, and the sacrament of the Lord's supper administered among them, in both which Christ crucified had been set before them. Now, it was the greatest madness that could be for those who had acquaintance with such sacred mysteries, and admittance to such great solemnities, not to obey the truth which was thus published to them, and signed and sealed in that ordinance. Note, The consideration of the honours and privileges we have been admitted to as Christians should shame us out of the folly of apostasy and backsliding.

2.He appeals to the experiences they had had of the working of the Spirit upon their souls (Gal 3:2); he puts them in mind that, upon their becoming Christians, they had received the Spirit, that many of them at least had been made partakers not only of the sanctifying influences, but of the miraculous gifts, of the Holy Spirit, which were eminent proofs of the truth of the Christian religion and the several doctrines of it, and especially of this, that justification is by Christ only, and not by the works of the law, which was one of the peculiar and fundamental principles of it. To convince them of the folly of their departing from this doctrine, he desires to know how they came by these gifts and graces: Was it by the works of the law, that is, the preaching of the necessity of these in order to justification? This they could not say, for that doctrine had not then been preached to them, nor had they, as Gentiles, any pretence to justification in that way. Or was it by the hearing of faith, that is, the preaching of the doctrine of faith in Christ as the only way of justification? This, if they would say the truth, they were obliged to own, and therefore must be very unreasonable if they should reject a doctrine of the good effects of which they had had such experience. Note, (1.) It is usually by the ministry of the gospel that the Spirit is communicated to persons. And, (2.) Those are very unwise who suffer themselves to be turned away from the ministry and doctrine which have been blessed to their spiritual advantage.

3.He calls upon them to consider their past and present conduct, and thence to judge whether they were not acting very weakly and unreasonably (Gal 3:3, Gal 3:4): he tells them that they had begun in the Spirit, but now were seeking to be made perfect by the flesh; they had embraced the doctrine of the gospel, by means of which they had received the Spirit, and wherein only the true way of justification is revealed. And thus they had begun well; but now they were turning to the law, and expected to be advanced to higher degrees of perfection by adding the observance of it to faith in Christ, in order to their justification, which could end in nothing but their shame and disappointment: for this, instead of being an improvement upon the gospel, was really a perversion of it; and, while they sought to be justified in this way, they were so far from being more perfect Christians that they were more in danger of becoming no Christians at all; hereby they were pulling down with one hand what they had built with the other, and undoing what they had hitherto done in Christianity. Yea, he further puts them in mind that they had not only embraced the Christian doctrine, but suffered for it too; and therefore their folly would be the more aggravated, if now they should desert it: for in this case all that they had suffered would be in vain - it would appear that they had been foolish in suffering for what they now deserted, and their sufferings would be altogether in vain, and of no advantage to them. Note, (1.) It is the folly of apostates that they lose the benefit of all they have done in religion, or suffered for it. And, (2.) It is very sad for any to live in an age of services and sufferings, of sabbaths, sermons, and sacraments, in vain; in this case former righteousness shall not be mentioned.

4.He puts them in mind that they had had ministers among them (and particularly himself) who came with a divine seal and commission; for they had ministered the Spirit to them, and wrought miracles among them: and he appeals to them whether they did it by the works of the law or by the hearing of faith, whether the doctrine that was preached by them, and confirmed by the miraculous gifts and operations of the Spirit, was that of justification by the works of the law or by the faith of Christ; they very well knew that it was not the former, but the latter; and therefore must needs be inexcusable in forsaking a doctrine which had been so signally owned and attested, and exchanging it for one that had received no such attestations.

Received ye the Spirit by the works of the law - This may refer to the miraculous gifts of the Spirit, which were very common in the apostolic Church. Did ye receive these extraordinary gifts in consequence of your circumcision, and observing the Mosaic precepts? or was it by the hearing of the Gospel, prescribing faith in Christ crucified? It may also refer to the spirit of adoption, and consequently to their sonship.

This one thing would I learn of you,.... Though there were many things he could have put to them, yet he would only ask this one question, which, if rightly attended to, and honestly answered, must expose their folly, and put an end to the controversy upon this head:

received ye the Spirit by the works of the law, or by the hearing of faith? This question supposes they had received the Spirit; that is, the Spirit of God, as a spirit of wisdom and knowledge in the revelation of Christ; as a spirit of regeneration and sanctification; as a spirit of faith and adoption; and as the earnest, seal, and pledge of their future glory. Now the apostle asks, whether they received this Spirit "by the works of the law"; meaning, either whether they could imagine, that they by their obedience to the law had merited and procured the Spirit of God; or whether they thought that the Spirit came to them, and into their hearts, through the doctrine or preaching of the law: the former could not be true, for if they could not obtain righteousness and life by the works of the law, then not the Spirit; besides, works done without the Spirit of God, are not properly good works: not the latter, for though by the law is the knowledge of sin, yet this leaves nothing but a sense of wrath and damnation in the conscience; it is the killing letter, and a ministration of condemnation and death, and not of the Spirit, and of life; this belongs to the Gospel, "or the hearing of faith"; for by "faith", is meant the Gospel, and particularly the doctrine of justification by faith in Christ's righteousness; and by "the hearing" of it, the preaching of it, the report of it, Isa 53:1 which, in the Hebrew text, is "our hearing", that by which the Gospel is heard and understood. Now in this way the Spirit of God is received; while the Gospel is preaching he falls on them that hear it, conveys himself into their hearts, and begets them again by the word of truth: and in this way the Galatians came by the Spirit, and which is another aggravation of their folly, that they should enjoy so great an advantage by the Gospel, and yet be so easily removed from it.

"Was it by the works of the law that ye received the Spirit (manifested by outward miracles, Gal 3:5; Mar 16:17; Heb 2:4; and by spiritual graces, Gal 3:14; Gal 4:5-6; Eph 1:13), or by the hearing of faith?" The "only" implies, "I desire, omitting other arguments, to rest the question on this alone"; I who was your teacher, desire now to "learn" this one thing from you. The epithet "Holy" is not prefixed to "Spirit" because that epithet is a joyous one, whereas this Epistle is stern and reproving [BENGEL].

hearing of faith--Faith consists not in working, but in receiving (Rom 10:16-17).