Bad things are bad!

Bad things are bad, which is why you shouldn't do them. But you should also not do bad things because it gives you more time to do good things, which is good. While not all bad people do bad things all the time, and neither do all good people never do bad things all the time; the more time any person spends doing things that are bad the more likely it becomes that they will be objectivly viewed as bad, which is bad.

Being good feels good, so do that instead.