258 PSYCHOTHERAPY : SCIENTIFIC AND RELIGIOUS chap.
This enumeration represents the extravert as the man of action and the introvert as the man of deliberation, which is the conception that has had great influence on psychological discussions of personality. Jung's own complete picture of personality types is not quite so simple, and the usual condensations are perhaps somewhat unjust to his entire theory. In addition to the general attitude types so far described, Jung also distinguishes four special ' function types ' based on his analysis of the chief varieties of human expression. These are stated as thinkings feelings sensation and intuition. According to Jung, one or another of these four processes is especially differentiated or well-developed in a given individual and hence plays a dominant role in his adaptation or orientation to life. Since the extravert-introvert classification overlaps the four special types, eight principal classes of personality are indicated. The l extraverted thinking type ' is concerned with facts and their classification, the ' introverted thinker ' with theories and with their application to himself. The ' extraverted feeling type ' wishes to be in harmony with the outside world and is able to achieve close sympathy with others, while the ' introverted feeling type ' is chiefly concerned with his internal harmony and tends to depreciate the influence of outer factors. The ' sensation ' types, principally influenced by pure pleasure and pain, and the ' intuitive ' types, dominated by indirect judgments or ' hunches ', are also either extraverted or introverted. This doctrine is further complicated by Jung's assertion that more than one of the four main functions may be important, and that an individual may be extraverted in one function but introverted in another. Also, if the ' conscious ' is extraverted in any one line, the ' unconscious ' attitude is introverted and vice versa. Jung considers these