The most ancient and important taboo prohibitions are the two basic laws of totemism: not to kill the totem animal and to avoid sexual intercourse with members of the totem clan of the opposite sex.
Sigmund FreudFree sexual intercourse between young males and respectable girls" was urgently necessary or society was "doomed to fall a victim to incurable neuroses which reduce the enjoyment of life to a minimum, destroy the marriage relation and bring hereditary ruin on the whole coming generation.
Sigmund FreudA layman will no doubt find it hard to understand how pathological disorders of the body and mind can be eliminated by 'mere' words. He will feel that he is being asked to believe in magic. And he will not be so very wrong, for the words which we use in our everyday speech are nothing other than watered-down magic. But we shall have to follow a roundabout path in order to explain how science sets about restoring to words a part at least of their former magical power.
Sigmund FreudWere we fully to understand the reasons for other people's behavior, it would all make sense.
Sigmund Freud