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"Does morality come from God?
For morality to come from God, God would have to exist. Since we are still waiting for a god’s existence to be demonstrated, this entire argument is moot. We could end the argument there, and tell theists to come back when they can show at least one god is not a figment of overactive imaginations. However, to explore the argument, we can assume a hypothetical god does exist and see where that takes us.
First, we should ask how God knows what is moral. Plato wrote a dialogue in which Socrates asks Euthyphro “Is what is morally good commanded by God because it is morally good, or is it morally good because it is commanded by God?” This is known as the Euthyphro dilemma.
If God is merely an agent advocating some universal morality, then morality exists independently of God and, given enough time, humans could discover it through reasoning. In this case, we would not need God—the only role for God would be to help speed up the process of discovery. God would be unnecessary.
On the other hand, if something is moral because God commands it, and for no other reason, then morality is arbitrary. We would be unable to reason our way to such a morality because it would not be based on reason. Furthermore, God could change his mind at any time, and reverse earlier moral commands. In this case, God would be necessary for morality, but morality would not be objective, it would be wholly subjective.
This logic leads us to the conclusion that God cannot be the author of objective morality. If there is objective morality, God would be a spectator to it—just as we are. And theists who argue that God is the source of objective morality must be wrong.
Some theists do not attempt to claim that divine morality is objective. Instead, they accept that God’s morality is inherently subjective and arbitrary, but there are fatal problems with this position too. The first problem is we have to decide which god we should take our morality from (more properly, which god and which religion). This is not a trivial problem."