If I rebuild what I have already torn down, I prove myself to be a lawbreaker.
18. For if I build again. The reply consists of two parts. This is the first part, and informs us that the supposition now made is at variance with his whole doctrine, since he had preached the faith of Christ in such a manner as to connect with it the ruin and destruction of sin.
I. From the account which Paul gives of what passed between him and the other apostles at Jerusalem, the Galatians might easily discern both the falseness of what his enemies had insinuated against him and their own folly and weakness in departing from that gospel which he had preached to them.
Commenting on Galatians 2:11-21
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...