The problem with this is, who decides who's authority is superior? Through your own religion? Through society's accepted opinions? your own? Its not always black and white. Back and white is easy, but i think its more complicated than that.Here's the problem with this premise. Without moral authority, who's morals are right and who's morals are wrong? I can list an infinite list of things that you could judge as moral or immoral. I can then go up to some random person and ask them to judge that same list as moral or immoral. Most likely the lists will not be the same and therefore who is moral?
For instance lets say you believe murdering is immoral. We'll let I stand for immoral, M stand for moral.
You say: Murdering = I
Person 2 says: Murdering = M
How can murdering be both immoral or moral? It can't, it's either moral or it's immoral. It is either right or wrong. What basis does your morality over rule person 2's?