Is something good just because God commanded it, or is there an independant notion of "good?"

This is a classic philosophical issue that is discussed most famously by Plato in the Euthyphro. Here is a link to a quote from Jonathan Sacks' book where he discusses this topic. Interesting food for thought...

http://hirhurim.blogspot.com/2009/05/euthyphros-false-dilemma.html