What does the Bible say about the prayer of the publican in Luke 18?

In Luke 18:13, the publican stands afar off, striking his chest and crying, 'God be merciful to me, a sinner.' This prayer exemplifies true humility and acknowledgment of sin, contrasting sharply with the self-righteousness of the Pharisee who boasts of his merits instead. In recognizing his unworthiness, the publican embodies the scriptural truth that all have sinned and fall short of the glory of God (Romans 3:23), and showcases that humility before God is essential to receive mercy and justification. His plea for mercy is a profound expression of faith in God's compassion and readiness to forgive.