Turning to attention, the primitive fact of correspondence between nature and stimulus which is the fundamental of life should prevail, however modified, when dealing with older children, and should remain the basis of education. I am prepared for the objections of "experts." Children must be accustomed to pay attention to everything, even to things which are distasteful to them, because practical life demands such efforts. The objection is based on a prejudice analogous to that which at one time made good fathers of families say: "Children should be accustomed to eat everything." In just the same way, moral training is put outside its rightful sphere--a fatal confusion. When ideas of this order, now happily obsolete, obtained, fathers would allow their children to fast all day, if they refused a dish they disliked at the mid-day meal, forbidding them anything but the rejected portion, which became ever colder and more disgusting, until at last hunger weakened the child's will and destroyed his caprice, and the plateful of cold food was swallowed. Thus, argued such a father, in the various circumstances in which he may be placed throughout his life, my son will be ready to eat whatever comes to hand, and will not be greedy and capricious. In those days also, sweets were forbidden to children (whose organisms require sugar, because the muscles consume a great deal of this during growth), in order to teach them to overcome greediness, and an easy and convenient method of correcting naughty children was to "send them to bed without any supper." Very similar methods are now adopted by those who insist that children should pay attention to things they dislike, in order to accustom them to the necessities of life. But as in the case of psychical nourishment hunger is never brought to bear upon the "cold and distasteful viands," the indigestible and heavy food weakens and poisons the unwilling recipient. Not thus shall we prepare the robust spirit, ready for all the difficult eventualities of life. The boy who swallowed the cold soup and went fasting to bed was the one whose body developed badly, who was too weak to resist infection when he encountered it, and fell ill; and morally it was he who, having a store of unsatisfied appetites within him, looked upon it as the greatest joy of his liberty, when he became an adult, to eat and drink to excess. How unlike was he to the boy of to-day, who, rationally fed and made robust of body, becomes the _abstemious_ man, who eats to live in health, and combats alcoholism and excessive and injurious feeding; the modern man, who can defend himself by so many means against infectious diseases, and who is so ready for effort that, without any compulsion, he braves the arduous exertion of sport, and attempts and carries out great enterprises, such as the discovery of the Poles and the ascent of lofty mountains.