I recently passed a church which had a sign out front saying:
GOOD – GOD = 0
Obviously the message from this church is that without God, there is no good, all goodness evidently seen as emanating from God.
Despite the support for rape found in the Bible: http://www.evilbible.com/Rape.htm.
Despite support for murder: http://www.evilbible.com/Murder.htm, Intolerance: http://www.skepticsannotatedbible.com/int/long.html, not to mention God’s desire for the many wars fought in his name.
When the church, or individual Christians do good for others, they are either working to spread their specific beliefs, working for reward in the next life, or avoiding punishment in the next life.
When atheists do good, they do so without any expectations of reward, or fear of punishment, and there are no beliefs involved in atheism. Admittedly, just as when Christians do good, there is that feeling of having done something worthwhile for humanity which every human experiences.
The Conclusion is obvious: (Good – God) > (Good + God).