Maybe it's naive of me to think so, but I believe that most of the theists that use this argument are suffering from cognitive dissonance. In order to believe that god is the source of morality they must convince themselves that without god they would have none.
It's a scary argument, but I think that if most of the people that make this argument were to suddenly find themselves in a godless existence, they would find their morality remained intact.
It's a scary argument, but I think that if most of the people that make this argument were to suddenly find themselves in a godless existence, they would find their morality remained intact.
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