It cannot be right to consider such men as Pascal and Newton, on the one hand, as men of the highest genius, on the other, as limited by a mass of prejudices which we of the present generation have long overcome. Is the present generation with its electrical railways and empirical psychology so much higher than these earlier times? Is culture, if culture has any real value, to be compared with science, which is always social and never individual, and to be measured by the number of public libraries and laboratories? Is culture outside human beings and not always in human beings? It is in striking harmony with the ascription to men alone of an ineffable, inexplicable personality, that in all the authenticated cases of double or multiple personality the subjects have been women. The absolute female is capable of sub-division; the male, even to the most complete characterology and the most acute experiment, is always an indivisible unit. The male has a central nucleus of his being which has no parts, and cannot be divided; the female is composite, and so can be dissociated and cleft. And so it is most amusing to hear writers talking of the soul of the woman, of her heart and its mysteries, of the psyche of the modern woman. It seems almost as if even an accoucheur would have to prove his capacity by the strength of his belief in the soul of women. Most women, at least, delight to hear discussions on their souls, although they know, so far as they can be said to _know_ anything, that the whole thing is a swindle. The woman as the Sphinx! Never was a more ridiculous, a more audacious fraud perpetrated. Man is infinitely more mysterious, incomparably more complicated. It is only necessary to look at the faces of women one passes in the streets. There is scarcely one whose expression could not at once be summed up. The register of woman’s feelings and disposition is so terribly poor, whereas men’s countenances can scarcely be read after long and earnest scrutiny. Finally, I come to the question as to whether there exists a complete parallelism or a condition of reciprocal interaction between mind and body. In the case of the female, psycho-physical parallelism exists in the form of a complete co-ordination between the mental and the physical; in women the capacity for mental exertion ceases with senile involution, just as it developed in connection with and in subservience to the sexual instincts. The intelligence of man never grows as old as that of the woman, and it is only in isolated cases that degeneration of the mind is linked with degeneration of the body. Least of all does mental degeneration accompany the bodily weakness of old age in those who have genius, the highest development of mental masculinity.