As an Atheist you wouldn't have any external incentive to be good. You have ''incentives'' to not be bad, which is the law and the fact that you can get punished for it. When it comes to doing good, though, you aren't good just because god tells you or because you want to go to heaven, you are good because you are, which is far better.
An atheist is never good. First, because he is not really an atheist, and therefore a liar. But most importantly, because he does not honor God, which is the first step in the direction of good.

I don't see why it's so important to ''honor'' God. A real god wouldn't care about us worshiping him whatsoever.