Romans 2:4 says, "Or do you presume on the riches of his kindness and forbearance and patience, not knowing that God's kindness is meant to lead you to repentance?" [Italics added by me]
This is a great verse I stumbled upon while I was reading the Bible just now. "God's kindness is meant to lead you to repentance." I've also heard this explained like, "Saved to be Holy." As Christians, we have a duty to God to repent--literally to turn away from what is evil.