Why is faith in Christ essential for a Christian's life?

Christ-centered faith is the foundation of a believer's life, as highlighted in Galatians 6:16. This faith establishes the rule by which Christians are called to live. It is through faith that believers experience true peace and mercy, recognizing that their righteousness is rooted in Christ's fulfillment of the law. The Apostle Paul emphasizes that a life governed by faith not only brings personal assurance of salvation but fosters unity among believers, uniting them in mutual dependence on Christ.