The oldest and simplest method, then, of describing differences in personali

The oldest and simplest method, then, of describing differences in personality was to (36) classify people ac cording to (37) types. Such a system is called a Typology.
    A famous example of this method was (38) set forth in Greece about the year 400 B.C. A (39) physician named Hippocrates theorized that there were four (40) fluids, or humors, in the body: blood, (41) yellow bile (NJ-) black bile, and phlegm (粘液). (42) Corresponding to each humor, there (43) existed a definite type of personality.
   A person in whom all four humors were in perfect balance had a harmonious personality.(44)If a person had too much blood, he was cheerfd real optimistic. Someone wit too much yellow bile was irritable and easily angered. (45) Too much black bile made a person depressed and pessimistic. An oversupply of phlegm caused a human being to be slow and unfeeling.
    Other features of people, such as their laces and fig ores, have also been used to classify personality. (46) To day, however, personality theories and classifications may also include factors such as heredity the environment, intelligence, and emotional needs.