Could the Galatians repent of their sins?

Answer:

• Paul gives himself as an example. "For you have heard of my former manner of life in Judaism, how I used to persecute the church of God beyond measure and tried to destroy it" (Galatians 1:13). However, God graciously called Paul into the fold of Christ (Galatians 1:15-16). "I was still unknown by sight to the churches of Judea which were in Christ; but only, they kept hearing, "He who once persecuted us is now preaching the faith which he once tried to destroy." And they were glorifying God because of me" (Galatians 1:22-24). If Paul can make that great of change, others can do the same.
• Peter is given as an example. He had accepted the Gentiles as Christians. In fact, he was the first to convert Gentiles to the faith (Acts 10-11). However, he sinned by allowing Jews to pressure him into avoiding the Gentiles. "But when Cephas came to Antioch, I opposed him to his face, because he stood condemned. For prior to the coming of certain men from James, he used to eat with the Gentiles; but when they came, he began to withdraw and hold himself aloof, fearing the party of the circumcision. The rest of the Jews joined him in hypocrisy, with the result that even Barnabas was carried away by their hypocrisy" (Galatians 2:11-13). We know that Peter did not remain in his sin. He clearly repented.
• Paul urged the Galatians to change. "I fear for you, that perhaps I have labored over you in vain. I beg of you, brethren, become as I am, for I also have become as you are. You have done me no wrong" (Galatians 2:10-11). Paul would not beg for them to change if it was not possible. "My children, with whom I am again in labor until Christ is formed in you -- but I could wish to be present with you now and to change my tone, for I am perplexed about you" (Galatians 4:19-20). Notice that Paul had labored to start the churches in Galatian, and he is laboring again so that Christ will be formed in them. He is expecting them to change. "I have confidence in you in the Lord that you will adopt no other view; but the one who is disturbing you will bear his judgment, whoever he is" (Galatians 5:10).
• Paul urges the faithful in the Galatian churches to restore those who have lost their way. "Brethren, even if anyone is caught in any trespass, you who are spiritual, restore such a one in a spirit of gentleness; each one looking to yourself, so that you too will not be tempted" (Galatians 6:1).

If the Galatians had no chance to turn from their sins, there would be no reason to write to them, scold them for their sins, and urge them to follow Christ.