A man must first of all understand certain things. He has thousands of false ideas and false conceptions, chiefly about himself, and he must get rid of some of them before beginning to acquire anything new. Otherwise the new will be built on a wrong foundation and the result will be worse than before. To speak the truth is the most difficult thing in the world; one must study a great deal and for a long time in order to speak the truth. The wish alone is not enough. To speak the truth one must know what the truth is and what a lie is, and first of all in oneself. And this nobody wants to know.