The concept of narcissism was introduced by Freud's psychoanalysis and is founded on a solid biological basis today, namely the so-called happiness hormones (endorphins, serotonin etc.), which generate happiness, joy and other positive feelings in the human being. By setting rules as to which actions are socially accepted and appreciated and thus associated with a positive feedback, society is able to promote the desirable behaviour and effectively control the integration of the individual into society. Happiness can be sought either in professional or in private life. Negative experiences in one of these fields can be compensated by positive experiences in the other. By means of a case, in which bottled-up narcissistic rage led to a state of severely impaired consciousness, the applicability of the forensic theory of narcissism in criminal law is illustrated and discussed. Depressive disorders, posttraumatic stress disorders, personality changes after extremely stressful situations and non-substance addictions such as computer addiction can be better understood on the basis of Kohut's model of the narcissistic balance of satisfaction.