ABSTRACT
Rush Rhees do not understand the relation between lex naturalis and lex divina in St. Thomas. But he spoke, sometimes anyway, of the lex naturalis as a law which men could know by the lumen naturale for the knowledge or understanding of which we do not need the lumen divinum. If it is contrary to nature means there is a natural reason for condemning it then the reason in question cannot be: that it is contrary to nature. He thinks Fr. R. was suggesting: Natural law is what makes ethical reasons into ethical reasons. It says that all ethical reasons have something in common. And so there is a common basis for discussion wherever ethical reasons are offered. Fr. R. spoke of getting at the truth on a moral question and of getting at the truth regarding the right system of ethics. Fr. R. emphasized the importance of responsibility in connexion with moral decisions.
