The catch is that all of "GOD'S" laws seem to come through the voices and hands of MEN---I prefer those laws we all agree upon for ourselves; the ones that hold up to scrutiny, are available to correction through checks and balances, responsive to the will and well being of the people, and vulnerable to that will when they become corrupt.  Our "perfect teacher" is the embodiment of our ideals and our continued efforts toward justice for ourselves and each other.  No, we're not perfect, and any attempt to pretend otherwise through the edifice of religion or any other device is both foolhardy and destructive to the aims of a democratic society.