248 THE WORLD AS IDEA. bk. iii.
number of really great men of genius that the whole of civilised Europe has produced, both in ancient and modern times, with the two hundred and fifty millions who are always living in Europe, and who change entirely every thirty years. In estimating the number of men of outstanding genius, we must of course only count those who have produced works which have retained through all time an enduring value for mankind. I shall not refrain from mentioning, that I have known some persons of decided, though not remarkable, mental superiority, who also showed a slight trace of insanity. It might seem from this that every advance of intellect beyond the ordinary measure, as an abnormal development, disposes to madness. In the meantime, however, I will explain as briefly as possible my view of the purely intellectual ground of the relation between genius and madness, for this will certainly assist the explanation of the real nature of genius, that is to say, of that mental endowment which alone can produce genuine works of art. But this necessitates a brief explanation of madness itself.[1]
A clear and complete insight into the nature of madness, a correct and distinct conception of what constitutes the difference between the sane and the insane, has, as far as I know, not as yet been found. Neither reason nor understanding can be denied to madmen, for they talk and understand, and often draw very accurate conclusions; they also, as a rule, perceive what is present quite correctly, and apprehend the connection between cause and effect. Visions, like the phantasies of delirium, are no ordinary symptom of madness: delirium falsifies perception, madness the thoughts. For the most part, madmen do not err in the knowledge of what is immediately present; their raving always relates to what is absent and past, and only through these to their connection with what is present. Therefore it seems to me that
- ↑ Cf. Chap. xxxi. of the Supplement.
