If all moral obligations originate from God’s commands, then so must our moral obligation to obey these commands. He commands us to obey his commands. But what is the moral reason to obey that command? An earlier command? What is the reason to obey that?

Do we have a moral obligation to follow God’s commands because we love him? This implies that we ought to love him. Why? Because he commands it? That’s a circle. Because he’s good? That seems to mean only that he follows his own commands — or else that goodness is a standard independent of God.