If you're God's enemy, he'll love you. Even if you've cursed him to his face, he'll bless you. God won't judge you; he'll forgive all your sins against him. And he'll do all of that with no expectation of anything in return. Believing in that radical grace is the key to radical obedience.
Watch this message with Steve teaching from Luke 6 and you'll see that only bad people can do truly good things.