How do we know that justification comes by faith?

The doctrine of justification by faith is a cornerstone of Reformed theology, illustrated in Galatians 3:11, which states, 'The just shall live by faith.' Paul argues that attempting to be justified by the law places one under a curse, as none can perfectly keep it. Instead, Abraham's example is used to demonstrate that faith, not works, results in righteousness. The essence of justification is rooted in the historical and gracious act of Christ, who redeemed us from the curse of the law, fulfilling what the law demanded.