Why is being justified by faith important for Christians?

Justification by faith is foundational to the Christian faith, signifying that we are made righteous before God not by our own works, but through faith in Jesus Christ. Paul emphasizes this in Galatians, where he corrects the false teaching that adds human merit to God's grace. If justification were possible through the law, the sacrifice of Christ would be rendered unnecessary. Instead, we are justified by Christ in Him alone, affirming that our salvation rests entirely on His redemptive work. This understanding leads to a profound assurance of salvation and a reliance on God's grace throughout our Christian journey.