"The repentance that really changes your heart and your relationship with God begins when you recognize that your main sin, the sin under the rest of your sins, is your self-salvation project...We try to prove ourselves by our moral goodness and through achievement or family or career. Even diligent involvement in the church and religion may need to be repented of once we understand that it was all a way to put God and others in our debt. Repentance, then, is confessing the things beside God himself that you have been relying on for your hope, significance and security. That means we should repent not only for things we have done wrong (like cheating or lying), but also for the motivations beneath our good works."
- Tim Keller, The Reason for God