Why is understanding Jesus' role in the new covenant important for Christians?

The new covenant, as established through Jesus, differs fundamentally from the old covenant by shifting the focus from human efforts to divine grace. While the old covenant emphasized the law and human righteousness, the new covenant centers on Christ's finished work on the cross. This understanding is critical for Christians, as it clarifies that we do not contribute to our salvation; rather, we are recipients of God's grace. This reality reminds believers to rely solely on Christ for righteousness, emphasizing a relationship with Him rather than a checklist of moral achievements. It aligns with Matthew 7, where many may claim their deeds, but Jesus emphasizes knowing Him personally, which is essential for true salvation.