Sin is powerful, even for those who have been reborn. Grace, however, is more powerful still. This is a true and trustworthy saying, that Jesus came into the world to save sinners, of which I am the chief (I Timothy 1:15). To diminish the power of grace is to diminish the scope of our own sin. Jesus, after all, didn’t come to save the polite, well-behaved people. He came to save His own, and gave them first repentant hearts.
R.C. Sproul Jr.