“It’s not just that there is almost certainly no God to dictate and enforce moral precepts. It’s that even if there were a God, his divine decrees, as conveyed to us through religion, cannot be the source of morality. The explanation goes back to Plato’s Euthyphro, in which Socrates points out that if the gods have good reasons to deem certain acts moral, we can appeal to those reasons directly, skipping the middlemen. If they don’t, we should not take their dictates seriously.” (Steven Pinker, Enlightenment Now)
mention of Plato argument via Socrates that appeals to God should be replaced with appeals to reason.