GALATIANS 3:12 But the law is not of faith, rather“The one who does them shall live by them.” Today we briefly look at Galatians 3, in which Paul explains the Abrahamic covenant, the law, and living by faith. For the Jews Paul was writing to, those who desire to become part of God's family must submit to Mosaic laws to experience full blessing, which made Paul ask "Having begun by the Spirit are you now being perfected by the flesh?" Clearly the blessing is in Christ Jesus through the promised Spirit (v.14) and not by works of the law. Here we see that the law functioned as a guardian, in the same way that a child would have a guardian or tutor until he grows up. When he's old enough, he would not forget the lesson but he wouldn't be under the tutor any longer. We are no longer under a guardian for in Christ Jesus we are all sons (and daughters) of God. The wall separating Jew and Greek has been broken down with the coming of Christ. The Gentiles that are being forced to get circumcised need not to submit to the law in order to be righteous but it is faith in Christ that they have righteousness.
I cannot do all that the law requires. The one who does them shall live by them. I cannot! We were all doomed to destruction... except that the Son of God came at the right time to fulfill the law, and in his mercy and love, faith in him is credited as our righteousness. Even if it took 430 years for Jesus to come since the giving of the law, God remained true to his word. He is a promise keeper. He also sees our weakness and knows that we cannot make ourselves righteous before him. And now through the Spirit which he supplies to believers, we are able to live by the "Spirit's law" (chapter 6). We are free from the curse of the law! And so when we fall and fail we look to Jesus, the author and perfecter of our faith. In him we find who we are, where we belong, how to live, where our hope is found.