Why Is the Law So Important?

Paul makes it quite clear, just as he did in Galatians, that the law is far from nullified or done away with. Paul now needs to make his case through the law itself that this gospel isn't something new at all. Since we're all subject to the same God and experience the same love, there's no reason or ability to boast. We're all children of God's household. Group one, two, and three are all parts of the same story.