Where is boasting then? It is excluded. By what law? Of works? No, but by the law of faith. 28 Therefore we conclude that a man is justified by faith apart from the deeds of the law. 29 Or is He the God of the Jews only? Is He not also the God of the Gentiles? Yes, of the Gentiles also, 30 since there is one God who will justify the circumcised by faith and the uncircumcised through faith. 31 Do we then make void the law through faith? Certainly not! On the contrary, we establish the law.
The six questions put in this short section basically ask a more fundamental question: what difference does this make? It excludes boasting because we are justified by faith, not by our own deeds. He is the God of the Gentiles as well as of the Jews because all can come to Him by faith. God’s law is not annulled by faith in Christ, but rather it is fulfilled, because His just sacrifice fulfils the law for us. We have a desire to walk in that law through Christ, not in order to be justified, but to obey Him. [Source: The Bible Panorama.]