Why is knowing about Jesus fulfilling the law important for Christians?

Jesus' fulfillment of the law is fundamental to the Christian faith, as it underscores the idea that salvation is not achievable through human effort but rather through faith in Christ's completed work. He stated that He came not to abolish the law but to fulfill it (Matthew 5:17). This fulfillment signifies that Christ lived a sinless life, perfectly obeying the law that humanity could never uphold. Consequently, His righteousness is imputed to believers, meaning they are seen as righteous before God, entirely based on Christ's merit, leading to assurance of salvation and eternal life in Him.