“It is therefore important to discover whether there is any answer to Hume within the framework of a philosophy that is wholly or mainly empirical. If not, there is no intellectual difference between sanity and insanity. The lunatic who believes that he is a poached egg is to be condemned solely on the ground that he is in a minority, or rather — since we must not assume democracy — on the ground that the government does not agree with him. This is a desperate point of view, and it must be hoped that there is some way of escaping from it.”