How do we know the concept of self-righteousness is true?

Scripture provides a robust foundation for understanding self-righteousness. It exposes the peril of trusting in one's own works rather than in the grace of God for salvation. The gospel is only effective for those who recognize themselves as hopeless sinners and are in need of redemption. Self-righteousness not only deceives individuals about their nature but also hinders them from receiving salvation through faith in Christ. Through Biblical teaching, we learn that self-righteousness is a deadly sin that leads countless souls to eternal separation from God, proving its reality and danger.