What does the Bible say about the purpose of the law in relation to sin?

The Bible clearly establishes that the purpose of the law is not to make people better, but to reveal their sinful nature. Romans 3:20 states, 'For by the law is the knowledge of sin.' The law functions as a schoolmaster, showing us our need for grace and ultimately leading us to Christ, who alone can provide the righteousness we cannot attain on our own. Therefore, the law's role is diagnostic—it shows us how far we fall short and drives us toward the gospel as our only hope for redemption and righteousness.