How does Jesus fulfill the law on behalf of sinners?

The fulfillment of the law by Jesus is central to the Gospel message. In Matthew 5:17, Jesus explicitly states that he came not to abolish the law but to fulfill it. This means that everything demanded by the law—perfect obedience—was accomplished by Christ in his life, death, and resurrection. Therefore, believers rely on this perfect fulfillment rather than their own imperfect attempts. By faith, we are united to Christ and his righteousness is credited to us, making it possible for us to stand before God as justified and accepted despite our failures to keep the law. This assures us that our righteousness is secure in him.