God: Parent or Policeman?
One of the ancient Greek wise guys was a man named Euthyphro, who, in the abstruse manner of philosophers, is said to have once asked, “Is good good because God says it is, or does God say it is because it is good?” This has since been referred to as Euthyphro’s question.
Consider the first hypothetical: Good is good because God says it is. Here, God is like the parent who, when his child asks why she ought to do something, gives the response, “Because I said so.” It is good for the child to obey her parent; what the parent says constitutes moral goodness for the child.