Thematic Bible: Who establishes the law

For we hold that a man is made upright by faith; the observance of the Law has nothing to do with it. Does God belong to the Jews alone? Does he not belong to the heathen too? Of course he belongs to the heathen too; there is but one God, and he will make the circumcised upright on the ground of their faith and the uncircumcised upright because of theirs." read more.
Is this using faith to overthrow law? Far from it. This confirms the Law.