Inhibition control, may develop later than it should, as I have already mentioned. At adolescence sex desire comes suddenly into play, but usually in one way or another there are checks upon its effects already established. But often there is not, and the boy or girl plunges into a sex life that brings them into violent conflict with themselves and society. Despite their efforts the non-ethical conduct continues; despite their tears and vows to reform they are swept by "temptation" into difficulty. Then suddenly or gradually, perhaps long after every one despairs of them, the inhibition appears, and they settle down to a controlled life. What has happened? We cannot say in anatomical terms, but from a psychological standpoint the function of inhibition, delayed in its appearance, finally comes on the scene. We see this delay in other phases of character; there is often delay in sex feeling, in the interest in work, in love of the beautiful, in control of anger, etc. Take the last mentioned: an irascible child grows into an irascible adolescent and even into a similar adult, flaring up under the least provocation, to the dismay and disgust of others and himself. "He can't control himself," so say others, and so thinks he. He vows reform, but nothing seems to help. Then like a miracle comes the longed-for inhibition; anger is still there when his will is crossed or his opinion scouted, but a firm hand is on it, and he maintains a calm he had despaired of reaching. Man is a bundle of disharmonies, as the great Eli Metchnikoff pointed out, physically, psychologically and sociologically. When these disharmonies are within average limits we do not notice them; when they are greater in degree they bring about conduct that at once claims attention. Sometimes a disharmony is merely an excess development of some ability, in which case, if the ability is socially valuable, we have the talented person or the genius. This is often the case with the artistic abilities and also with the physical powers. If the disharmony involve an instinct, an emotion or certain phases of the intelligence, we are brought face to face with the abnormal. There is, of course, disharmony through ordinary defect as in feeble-mindedness, as in absence of some essential emotion or instinct. These are hopeless situations and belong in the grim field of psychopathology. Often what seems to be a defect is a "sleeping" quality, and one that will awaken under appropriate circumstance. Conspicuously, maternal love is of this nature. One sees a girl who has no interest in children, considers them bores and nuisances, who marries with the hope she will be childless, and with the first baby becomes a passionately devoted mother, even fiercely maternal. In the following pages I shall sketch some prominent character types. This has been done by such masters as Aristotle, Spinoza, Kant, La Bruyere, Stewart, Ribot, Mill, etc., but with a different purpose and starting point than mine.