Not by Works
Paul continues to contrast living under the law as opposed to living under grace. For hundreds of years, all the Jews had known was the law plus all the man-made traditions that had been added by the priests and the religious leaders. That now there was a different way to please God was going to take a lot of “unteaching ” and “unlearning”. The law was not given to be a curse, but it became a curse because the flesh could not live up to its standards. It did not require faith, it was a law of works. It was meant to be a teacher showing “all have sinned and come short of the glory of God”. We needed a change, but to have that change, we needed someone to remove us from under the curse of sin and the law. Jesus became a curse and a Redeemer for us. Through the shed blood of Jesus Christ, we can now receive the promise of the blessing of Abraham. We could not become the physical offspring of Abraham, but we could become the Spiritual descendants of the “seed” of Abraham. That “Seed” is Jesus Christ.
13 For the promise that he would be the heir of the world was not to Abraham or to his seed through the law, but through the righteousness of faith. 14 For if those who are of the law are heirs, faith is made void and the promise made of no effect—Romans 4:13,14 (NKJV)