I'm actually going to back NoiselessPurse up here. Here's an abridged version of the Euthyphro Dilemma, for all you theists. [quote]Let's assume that God exists, and that God says Behavior X is good. Is Behavior X good because God commands it, or does God command behavior X because it's good? It can't be both, because if it were both then you could have a circular argument proceeding much like the following: "Why is Behavior X good?" "God commands it." "Why does God command it?" "Because it's good." Rinse and repeat for all eternity. So it can't be both. Let's go over the options. If Behavior X is good simply because God commands it, then you may as well be one of those cultists who still sacrifices animals. I'm not willing to say anything farther, but Behavior X could be [i]anything[/i], and by that logic you'd still be forced to say it's good. So it's got to be the other option, right? Think again! If God commands Behavior X because it's good, then its goodness exists independently of God. Which is to say, God's irrelevant because goodness is caused by something else! tl;dr God is either arbitrary or irrelevant, by matter of logical necessity. [/quote] All of that's assuming God actually exists!