What does the parable of the Pharisee and publican teach about self-righteousness?

In the parable, the Pharisee exemplifies self-righteousness as he prides himself on his moral standing and religious practices. His prayer, filled with self-congratulation, reflects a heart devoid of true repentance. Contrastingly, the publican's humble acknowledgment of his sin underlines God's grace. Jesus concludes that the publican, who asked for mercy, was justified rather than the Pharisee, reiterating that self-righteousness alienates a person from God and His mercy. This parable serves as a powerful reminder of the importance of humility and reliance on God's grace for salvation.