These primitive impulses go through a long process of development before they can become active in the adult. They become inhibited and diverted to other aims and fields, they unite with each other, change their objects and in part turn against one's own person. The formation of reactions against certain impulses give the deceptive appearance of a change of content, as if egotism had become altruism and cruelty had changed into sympathy. The formation of these reactions is favored by the fact that many impulses appear almost from the beginning in contrasting pairs; this is a remarkable state of affairs called the ambivalence of feeling and is quite unknown to the layman. This feeling is best observed and grasped through the fact that intense love and intense hate occur so frequently in the same person. Psychoanalysis goes further and states that the two contrasting feelings not infrequently take the same person as their object. What we call the character of a person does not really emerge until the fate of all these impulses has been settled, and character, as we all know, is very inadequately defined in terms of either "good" or "evil." Man is seldom entirely good or evil, he is "good" on the whole in one respect and "evil" in another, or "good" under certain conditions, and decidedly "evil" under others. It is interesting to learn that the earlier infantile existence of intense "bad" impulses is often the necessary condition of being "good" in later life. The most pronounced childish egotists may become the most helpful and self-sacrificing citizens; the majority of idealists, humanitarians, and protectors of animals have developed from little sadists and animal tormentors. The transformation of "evil" impulses is the result of two factors operating in the same sense, one inwardly and the other outwardly. The inner factor consists in influencing the evil or selfish impulses through erotic elements, the love needs of man interpreted in the widest sense. The addition of erotic components transforms selfish impulses into social impulses. We learn to value being loved as an advantage for the sake of which we can renounce other advantages. The outer factor is the force of education which represents the demands of the civilized environment and which is then continued through the direct influence of the cultural _milieu_.