Why is the law important if it cannot save us?

The law serves a vital purpose in the believer's life; although it cannot save, it functions as a schoolmaster that leads us to Christ. Romans 3:20 states that through the law comes the knowledge of sin, helping us recognize our need for a Savior. The law is good when used lawfully, as it reveals our complete inability to achieve righteousness on our own and directs our hearts to trust in Jesus, who fulfilled the law perfectly on our behalf. Therefore, the law continues to play an essential role in guiding believers in their relationship with God and understanding His holiness.