For if I build again the things which I destroyed - Paul here uses the first person; but he evidently intends it as a general proposition, and means that if anyone does it he becomes a transgressor. The sense is, that if a man, having removed or destroyed that which was evil, again introduces it or establishes it, he does wrong, and is a transgressor of the Law of God. The particular application here, as it seems to me, is to the subject of circumcision and the other rites of the Mosaic law. They had been virtually abolished by the coming of the Redeemer, and by the doctrine of justification by faith. It had been seen that there was no necessity for their observance, and of that Peter and the others had been fully aware. Yet they were lending their influence again to establish them or to build them up again. They complied with them, and they insisted on the necessity of their observance. Their conduct, therefore, was that of building up again that which had once been destroyed, destroyed by the ministry, and toils, and death of the Lord Jesus, and by the fair influence of his gospel. To rebuild that again; to re-establish those customs, was wrong, and now involved the guilt of a transgression of the Law of God. Doddridge supposes that this is an address to the Galatians, and that the address to Peter closed at the previous verse. But it is impossible to determine this; and it seems to me more probable that this is all a part of the address to Peter; or rather perhaps to the assembly when Peter was present; see the note at Galatians 2:15.

For if I build again the things which I destroyed - If I act like a Jew, and enjoin the observance of the law on the Gentiles, which I have repeatedly asserted and proved to be abolished by the death of Christ, then I build up what I destroyed, and thus make myself a transgressor, by not observing the law in that way in which I appear to enjoin the observance of it upon others.

For if I build again the things which I destroyed,.... Which must be understood not of good things, for formerly he destroyed the faith of the Gospel, at least as much as in him lay, and now he built it up, established, and defended it; in doing which he did no evil, or made himself a transgressor, but the reverse; he showed himself a faithful minister of Christ: but of things not lawful, such as the rites and ceremonies of the law of Moses, which were now abrogated, and he had declared to be so all over the Gentile world; and therefore should he go about to establish these things as necessary to salvation, or teach men to join the observance of them with Christ's righteousness for justification, then, says he,

I make myself a transgressor: for he could not be otherwise, be the case how it would with respect to the abrogation, or non-abrogation of the law; for if the law was not abolished, then he made himself a transgressor of it; by neglecting it himself, and teaching others to do so; and if it was abolished, then it must be criminal in him to enforce the observance of it as necessary to a sinner's justification before God. Now though the apostle transfers this to himself, and spoke in his own person to decline all invidious reflections and characters; yet he tacitly regards Peter, and his conduct, who had been taught by the vision the abrogation of the ceremonial law, and acted accordingly by conversing and eating with the Gentiles, and had declared that law to be an insupportable yoke of bondage, which the Gentiles were not obliged to come under; and yet now, by his practice and example, built up and established those very things he had before destroyed, and therefore could not exculpate himself, from being a transgressor: or these things may regard sins and immoralities in life and conversation; and the apostle's sense be, that should he, or any other, take encouragement to sin from the doctrine of free justification by the righteousness of Christ, as if he was the author and minister of sin, and allowed persons in it; this would be to establish sin, which the righteousness of Christ justifies from, and engage in a living in sin, to which, by Christ's righteousness, they are dead unto; than which, nothing can be, a greater contradiction, and which must unavoidably make them not only transgressors of the law, by sinning against it, but apostates, as the word here used signifies, from the Gospel; such must act quite contrary to the nature, use, and design of the Gospel in general, and this doctrine in particular, which teaches men to deny ungodliness and worldly lusts, and that being dead to sin, they should live unto righteousness.

I build again the things which I destroyed (ἃ κατέλυσα ταῦτα πάλιν οἰκοδομῶ)

Peter, by his Christian profession, had asserted that justification was by faith alone; and by his eating with Gentiles had declared that the Mosaic law was no longer binding upon him. He had thus, figuratively, destroyed or pulled down the Jewish law as a standard of Christian faith and conduct. By his subsequent refusal to eat with Gentiles he had retracted this declaration, had asserted that the Jewish law was still binding upon Christians, and had thus built again what he had pulled down. Building and pulling down are favorite figures with Paul. See Romans 14:20; Romans 15:20; 1 Corinthians 8:1, 1 Corinthians 8:10; 1 Corinthians 10:23; 1 Corinthians 14:17; Ephesians 2:20 f. For καταλύειν destroy, see on Romans 14:20; see on 2 Corinthians 5:1.

I make myself (ἐμαυτὸν συνιστάνω)

Better, prove myself. The verb originally means to put together: thence to put one person in contact with another by way of introducing him and bespeaking for him confidence and approval. To commend, as Romans 16:1; comp. Romans 5:8; 2 Corinthians 3:1; 2 Corinthians 4:2; 2 Corinthians 5:12. As proof, or exhibition of the true state of a case is furnished by putting things together, the word comes to mean demonstrate, exhibit the fact, as here, Romans 3:5; 2 Corinthians 6:11.

A transgressor (παραβάτην)

See on James 2:11, and see on παράβασις transgression, Romans 2:23. In reasserting the validity of the law for justification, which he had denied by seeking justification by faith in Christ, he proves himself a transgressor in that denial, that pulling down.

For if I build again the things which I destroyed, I make myself a transgressor.

2:18 If I build again the things which I destroyed. Go back from Christ to Moses, and teach others to do the same.

I make myself a transgressor. For thus I teach men to trust in the works of the law which cannot justify.

2:18 By no means. For if I build again - By my sinful practice. The things which I destroyed - By my preaching, I only make myself - Or show myself, not Christ, to be a transgressor; the whole blame lies on me, not him or his gospel. As if he had said, The objection were just, if the gospel promised justification to men continuing in sin. But it does not. Therefore if any who profess the gospel do not live according to it, they are sinners, it is certain, but not justified, and so the gospel is clear.

Margin transgressor

Sin. See Scofield Note: "Rom 3:23".

18. Greek, "For if the things which I overthrew (by the faith of Christ), those very things I build up again (namely, legal righteousness, by subjecting myself to the law), I prove myself (literally, 'I commend myself') a transgressor." Instead of commending yourself as you sought to do (Ga 2:12, end), you merely commend yourself as a transgressor. The "I" is intended by Paul for Peter to take to himself, as it is his case, not Paul's own, that is described. A "transgressor" is another word for "sinner" (in Ga 2:17), for "sin is the transgression of the law." You, Peter, by now asserting the law to be obligatory, are proving yourself a "sinner," or "transgressor," in your having set it aside by living as the Gentiles, and with them. Thus you are debarred by transgression from justification by the law, and you debar yourself from justification by Christ, since in your theory He becomes a minister of sin.

2:15-19 Paul, having thus shown he was not inferior to any apostle, not to Peter himself, speaks of the great foundation doctrine of the gospel. For what did we believe in Christ? Was it not that we might be justified by the faith of Christ? If so, is it not foolish to go back to the law, and to expect to be justified by the merit of moral works, or sacrifices, or ceremonies? The occasion of this declaration doubtless arose from the ceremonial law; but the argument is quite as strong against all dependence upon the works of the moral law, as respects justification. To give the greater weight to this, it is added, But if, while we seek to be justified by Christ, we ourselves also are found sinners, is Christ the minister of sin? This would be very dishonourable to Christ, and also very hurtful to them. By considering the law itself, he saw that justification was not to be expected by the works of it, and that there was now no further need of the sacrifices and cleansings of it, since they were done away in Christ, by his offering up himself a sacrifice for us. He did not hope or fear any thing from it; any more than a dead man from enemies. But the effect was not a careless, lawless life. It was necessary, that he might live to God, and be devoted to him through the motives and grace of the gospel. It is no new prejudice, though a most unjust one, that the doctrine of justification by faith alone, tends to encourage people in sin. Not so, for to take occasion from free grace, or the doctrine of it, to live in sin, is to try to make Christ the minister of sin, at any thought of which all Christian hearts would shudder.