Why is the finished work of Christ important for Christians?

Understanding the finished work of Christ is vital for Christians as it signifies that our salvation is complete and secure through His sacrifice. In John 17:4, Jesus states, 'I have finished the work which thou gavest me to do,' emphasizing that all requirements for redemption were met. As believers, we can rest in the assurance that nothing can be added or take away from what Christ has accomplished. His completed work is the foundation of our faith, guaranteeing our acceptance before God and affirming that all for whom He died will be saved. This doctrine nurtures a deeper understanding of grace and peace, relieving us from the burden of self-justification.