How do we know faith is justified by works?

The Epistle of James emphasizes that faith without works is dead, highlighting the need for works as evidence of genuine faith. James illustrates this through the examples of Abraham and Rahab, whose actions demonstrated their faith and confirmed their justification before men (James 2:21-26). While justification before God is by faith alone, the works that follow faith serve as tangible proof of that faith. James asserts, 'as the body without the spirit is dead, so faith without works is dead also' (James 2:26), showing that living faith naturally produces good works as its fruit.