This presentation of Jung's psychotherapy is intended to give a condensed picture and an introduction to his extensive publications and method of therapy. Jung popularised the terms 'introvert and extravert', interpreted the deeper conscious levels, and established psychotherapy as the treatment of disorders. His theory of 'psychic energy' emphasised a final point of view as against a purely causal one. His discovery and exploration of the 'collective unconscious', with its 'archetypes' was an impersonal substratum underlying the 'personal unconscious'; the concept of the psyche as a 'self-regulating system' expressing itself in the process of 'individualisation'. Jung's latter work included dreams and drawings interpretation, symbolism, myths, historical antecedents, physics... Thus, Jung's work has become of great importance for medicine, psychology, anthropology, religion, art, history, literature, etc...