How do we know that we are justified by faith in Christ?

The doctrine of justification through faith is clearly laid out in Galatians 2:16, where it states that a man is not justified by the works of the law but by the faith of Jesus Christ. This means our standing before God is not based on our merits or actions, but solely on Christ's work and the faith that He imparts to us. This faith is not merely faith in Christ but is defined as the faith of Christ—signifying that it is His own faith that justifies us. Thus, our justification is entirely a work of Christ, securing our acceptance with God, and nullifying any reliance on human effort.