Against this a double wall is set up: on the one hand, revelation which is the assumption that the reasons lying behind the laws are not of human origin, that they were not sought out and found by a slow process and after many errors, but that they are of divine ancestry, and came into being complete, perfect, without a history, as a free gift, a miracle.; and on the other hand, tradition which is the assumption that the law has stood unchanged from time immemorial, and that it is impious and a crime against one's forefathers to bring it into question.