John Calvin on Galatians 2:5

5. To whom we gave place by subjection, no, not for an hour. This steadiness was the seal of Paul’s doctrine. For when false brethren, who wished nothing more than a ground of accusation against him, exerted themselves to the utmost, and he stood firm, there could no longer be any room for doubt. It cannot now be insinuated that he deceived the apostles. He asserts that he did not for a moment give place to them by subjection, that is, by such a mode of yielding as would have implied that his liberty had been crushed. In every other respect, he was prepared, to the very close of his life, to exercise mildness and forbearance toward all men.

That the truth of the gospel. There was no danger that Paul would be deprived of his liberty even by yielding to them; but the example would have done harm to others, and therefore he prudently inquired what was expedient. This shows us how far offenses must be avoided, and points us to edification as the object which ought to be kept in view in all matters of indifference. The amount, is this: “We are the servants of the brethren, but still keeping in view that we all serve the Lord, and that the liberty of our conscience shall remain unimpaired.” When false brethren wished to bring the saints in to bondage, it was their duty not to yield to them.

The truth of the gospel denotes its genuine purity, or, which means the same thing, its pure and entire doctrine. For the false apostles did not altogether set aside the gospel, but mixed up with it their own notions, so as to give it a false and disguised aspect, which it always has when we make the smallest departure “from the simplicity that is in Christ.” (2 Corinthians 11:3.)

With what effrontery then will the Papists boast that they possess the gospel, which is not only corrupted by many inventions, but more than adulterated by many wicked doctrines? Let us remember that it is not enough to retain the name of the gospel, and some kind of summary of its doctrines, if its solid purity do not remain untouched. Where are the men who, by pretended moderation, endeavor to bring about a reconciliation between us and the Papists? as if the doctrine of religion, like a matter affecting money or property, could be compromised. With what abhorrence would such a transaction have been regarded by Paul, who affirms that it is not the true gospel, if it is not pure!

Galatians 2:6-10

6. But of those who seemed to be somewhat, (whatsoever they were, it maketh no matter to me: God accepteth no man’s person:) for they who seemed to be somewhat in conference added nothing to me:

6. Ab iis autem qui videbantur aliquid esse, quales aliquando fuerint, nihil mea refert (personam hominis Deus non accipit, Deuteronomy 10: 17; 2 Paral. 19:7; Job 34:19; Wisdom 6:8.; Ecclesiastes 35:15; Acts 10:34; Romans 2:11; Ephesians 6:9; Colossians 3:25; 1 Peter 1:17) nam mihi, qui videbantur esse in pretio nihil contulerunt

7. But contrariwise, when they saw that the gospel of the uncircumcision was committed unto me, as the gospel of the circumcision was unto Peter;

7. Imo contra, quum vidissent mihi concreditum fuisse evangelium praeprputii, quemadmodum Petro Circumcisionis;

8. (For he that wrought effectually in Peter to the apostleship of the circumcision, the same was mighty in me toward the Gentiles:)

8. (Nam qui efficax fuit in Petro ad apostolatum Circumcisionis efficax fuit et in me erga Gentes);

9. And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas right hands of fellowship; that we should go unto the heathen, and they unto the circumcision.

9. Quumque cognovissent gratiam mihi datam Iaeobus et Cephas et Ioannes, qui videbantur columnae esse, dextras dederunt mihi ac Barnabae societatis, ut nos inter Gentes, ipsi vore in Circumcisionem, apestolatu fungerenur.

10. Only they would that we should remember the poor; the same which I also was forward to do.

10. Tanturn ut pauperurn memores essenms, in quo et diligens fui, ut hoc ipsum facerem.