Like all factors of degeneracy, school strain evinces itself in a systemic nervous exhaustion manifest along lines of least resistance, as in the neuroses of Christopher. The first types of his neuroses are due to overstrain of certain territories related with memory, as contrasted with diminished use of the association fibres connecting these. As Schopenhauer has excellently observed, man is one-third intellect and two-thirds will, and much of this last two-thirds is the result of training. Capacity for training may be greater in one individual than another, because of inherited or congenital deficiencies. It is, as Sully[180] remarks, "a happy circumstance in healthy children that that most prolific excitant of fear, the presentation of something new and uncanny, is also provocative of curiosity, with its impulse to look and examine. A very tiny child, on first making acquaintance with some form of physical pain, as a bump on the head, will deliberately repeat the experience by knocking his head against something as if experimenting and watching the effect. A clearer case of curiosity overpowering fear is that of a child who, after pulling the tail of a cat in a bush and getting scratched, proceeded to dive into the bush again. Still more interesting here are gradual transitions from actual fear, before the new and strange, to bold inspection. The child who was frightened by her Japanese doll insisted on seeing it every day. The behaviour of one of these small persons on the arrival at the house of a strange dog, of a dark foreigner or some other startling novelty is a pretty and amusing sight. The first overpowering timidity, the shrinking back to the mother's breast, followed by curious peers, then by bolder outstretchings of head and arms, mark the stage by which curiosity and interest gain on fear, and finally leave it far behind. Very soon the small, timorous creatures will grow into bold adventurers. They will make playthings of the alarming animals and of the alarming shadows too. Later on still perhaps they will love nothing so much as to probe the awful mysteries of gunpowder." In degenerate children, because of deficiencies of proper inter-association of the memory territories in the brain, healthy curiosity, and the instinct of sheltering are deficient, so that states of uncertainty, producing terror, result. These become permanent in after life, even when training as an adult is strongly antagonistic to them.