Jung has pointed out how frequently introversion or turning in of the life-force is brought about by the painfulness of present reality and by the lack of the power of adaptation to things as they are. But this lack always has its roots in childhood. The woman who is shocked at the thought of sex is the little girl who reacted too strongly to early impressions. The man of forty who is disgruntled because he is not made manager of a business created by others is the little boy who was jealous of his father and wanted to usurp his place of power. The man who suffers from a sense of inferiority because his friend has a handsomer or more intellectual wife is the same little boy who strove with his father for possession of the mother, the most desired object in his childish environment. The measure of escape from these childish attitudes means the measure of success in life. Fortunately for society, the average person achieves this success. The normal person in his childhood learned how to switch the energy of his primitive desires into channels approved by society. Stored away in his subconscious, this acquired faculty carries him without conscious effort through all the necessary adjustments in maturity. The nervous person, less well equipped in childhood, may fortunately acquire the faculty in all its completeness, although at the cost of genuine effort and patient self-study. =Sublimation the Key Word.= In the prevention and in the cure of nervous disorders there is one factor of central importance, and that factor is sublimation--or the freeing of sex-energy for socially useful, non-sexual ends. To sublimate is to find vent for oneself and to serve society as well; for sublimation opens up new channels for pent-up energy, utilizing all the surplus of the sex-instinct in substitute activities. When the dynamic of this impulse is turned outward, not inward, it proves to be one of man's greatest possessions, a valuable contribution of energy to creative activities and personal relationships of every kind.