When I hear the "what's the point of doing good" question from a theist, what I hear them actually saying is "if I didn't have a god watching over me commanding me to do so, I would be out raping and murdering." It's an admittance that the only thing holding them back from being a complete sociopath is the retribution they believe they would receive for being so, and that is acting out of pure self-interest. The atheist that does good for the sake of doing good can be considered more moral than the theist that does it simply because of the whims of their deity.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell
