How do we know the necessity of the law?

The necessity of the law is heavily emphasized in Scripture, particularly in Romans 7:13, where Paul explains that the law is good and intended to make sin exceedingly sinful. The law cannot grant life or righteousness, as stated in Galatians 3:21, but its purpose is to reveal our sinfulness and lead us to Christ. As we see our inability to fulfill the law's demands, we acknowledge our desperate need for a Savior, leading us away from self-reliance and toward faith in Jesus Christ, who fulfills the law perfectly on our behalf.