mind, heat without light, hot‐headed persons, men of unsupportable restlessness and petulance. That of two brothers only one has genius, and that one generally the elder, as, for example, in Kant’s case, is primarily to be explained from the fact that the father was at the age of strength and passion only when he was begotten; although also the other condition originating with the mother may be spoiled by unfavourable circumstances. I have further to add here a special remark on the _childlike_ character of the genius, _i.e._, on a certain resemblance which exists between genius and the age of childhood. In childhood, as in the case of genius, the cerebral and nervous system decidedly preponderates, for its development hurries far in advance of that of the rest of the organism; so that already at the seventh year the brain has attained its full extension and mass. Therefore, Bichat says: “_Dans l’enfance le système nerveux, comparé au musculaire, est proportionellement plus considérable que dans tous les âges suivans, tandis que par la suite, la pluspart des autres systèmes prédominent sur celui‐ci. On sait que, pour bien voir les nerfs, on choisit toujours les enfans_” (_De la vie et de la mort_, art. 8, § 6). On the other hand, the development of the genital system begins latest, and irritability, reproduction, and genital function are in full force only at the age of manhood, and then, as a rule, they predominate over the brain function. Hence it is explicable that children, in general, are so sensible, reasonable, desirous of information, and teachable, nay, on the whole, are more disposed and fitted for all theoretical occupation than grown‐up people. They have, in consequence of that course of development, more intellect than will, _i.e._, than inclinations, desire, and passion. For intellect and brain are one, and so also is the genital system one with the most vehement of all desires: therefore I have called the latter the focus of the will. Just because the fearful activity of this system still slumbers, while that of the brain has already full play, childhood is the time of innocence and happiness, the paradise of life, the lost Eden on which we look longingly back through the whole remaining course of our life. But the basis of that happiness is that in childhood our whole existence lies much more in knowing than in willing—a condition which is also supported from without by the novelty of all objects. Hence in the morning sunshine of life the world lies before us so fresh, so magically gleaming, so attractive. The small desires, the weak inclinations, and trifling cares of childhood are only a weak counterpoise to that predominance of intellectual activity. The innocent and clear glance of children, at which we revive ourselves, and which sometimes in particular cases reaches the sublime contemplative expression with which Raphael has glorified his cherubs, is to be explained from what has been said.