What does the Bible say about the law and its purpose?

According to Galatians 3:19, the law was added because of transgressions and served as a means to reveal sin until the promised seed, Jesus Christ, came. This suggests that the law's primary purpose was to expose humanity's sinful nature, not to provide a means of justification or righteousness before God. Paul emphasizes that the law cannot disannul God's covenant of grace, affirming that the inheritance is received through the promise made to Abraham, not through the law (Galatians 3:17-18).