Why is understanding Christ's accomplished work important for Christians?

Recognizing the finished work of Christ is essential for the believer's security in salvation. The victory Christ secured means that God's people do not strive for salvation through their efforts; rather, they rest in the completed work of Christ. This understanding brings comfort, knowing that their warfare against sin has been won and their sins are forgiven through Him. It encourages believers to trust in Christ continually, acknowledging that their faith itself is a gift from God, and reinforcing the assurance that their standing before Him is based on His perfect righteousness, not their own.