Once upon a time, Plato, in one of his dialogues (Euthyphro), asked this:  "Do actions become moral simply because they're dictated by God, or are they dictated by God because they are moral?"
     It's an interesting question.  For a theist, the first option would be true.  That is, the reason a theist holds anything to be moral is that God has decided and ordained that it should be moral.  Those who choose the second option, however, realize that they are relegating God to a much different position.  God does not decide what is moral; rather, someone else (presumably human beings) determines what is moral.  God simply affirms that someone's decision.  Belief in God persists, but it's viewed in an entirely different light.
     There is a third approach.  If one does not believe in God at all, she would say that the issue of God is not relevant here, that we, that is, we human beings, and only we human beings, decide what is moral.  We do not need God to agree with what we're doing.  He's not necessary.
     What seems to be missing in this equation, however, is consideration of the fact of morality itself.  What is morality?  Why do we insist that it exists?  Why are we moral beings?  Put another way, why, in a vast and largely impenetrable cosmic dust and plasma universe, do we think about right and wrong?
     If we say that from an evolutionary standpoint morality has proven beneficial to the human species, we still have not answered the question of how an impersonal universe would ever produce morally aware beings.  What could possibly be plasma's motivation for birthing morality?
     That, to me, is the most important question of all.