What does the Bible say about mercy and vengeance?

The Scriptures emphasize that mercy is a fundamental attribute of God. In Romans 12:19, we are reminded not to seek personal revenge but to leave judgment in God's hands, as 'vengeance is mine, saith the Lord.' This reflects the nature of God, who shows mercy to the undeserving. When faced with wrongs against us, the believer is called to respond with grace, just as David did when he spared Saul's life despite having the opportunity to take vengeance. The overarching theme is that true strength lies in trusting God's perfect timing and justice rather than acting on our impulses, which are often tainted by pride and anger.