But of all the deadly theories by means of which you are now being destroyed, I would like to warn you about one of the deadliest and most crucial: the alleged dichotomy of science and ethics. It is the doctrine that man's science and ethics - or his knowledge and values, or his body and soul - are two separate, antagonistic aspects of his existence, and that man is caught between them, as a precarious, permanent traitor to their conflicting demands.