In the individual, a motive of this kind does not become a religion or a ritual as in the case with the race, but it nevertheless is forcefully expressed in that it excites an absorbing interest and forces itself strongly into consciousness, during the phase of its dynamic development. As stated above, just as in the early mental evolution of the race, we find that the question of reproduction comes prominently to the fore, so with the individual we find that at the adolescent period of life the sexual instinct is very fully elaborated. Just as with the race reproduction is necessary for the continuation of the race, so with the individual, elaboration of sexual instinct is necessary in order that adult sexual responsibilities may be assumed. This consists of much more than mere physical development. In a complex state of civilization many adjustments in the sphere of sexual indulgence and continence and marriage have to be made. This phase of the individual's life is a very important one. It is the rule for proper reactions to occur at this time, in which case the reproductive instincts assume their proper place in mental life. But if satisfactory adjustments do not occur the consequences may be serious. In the healthy mental evolution of the individual, therefore, just as in the normal mental evolution of the race, we see that motives arise, assume a dynamic character, play their part in the developing mind, and leave lasting impressions. They serve a useful purpose during one phase of mental evolution. We have seen that they may be harmful in the race if utilized at a later period. Let us see to what extent this is true of the individual. * * * * *