In 2 Corinthians 7:8-10, Paul explains that while he regretted causing the Corinthians sorrow through a painful letter, he was also glad because it caused them to repent and change their behavior. So just what does repentance truly mean, and how does it differ from mere regret? As we look at examples from both the Old and New Testaments, we learn whose repentance was sincere, see the outcomes of their acknowledgment of sin, and discover why love is the key.