The Tree of Widsdom

智慧の樹

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(350 BCE – 1858)

For 2000 years, European medicine was based on the humoralism theory of Galen (129–216) and Hippocrates (460– 370 BCE). According to humoralism, the human body is filled with four basic liquids, called humors, which are in balance when a person is healthy.

The four humors
HumorSeasonElementOrganQualitiesTemperamentTemperament characteristics
Bloodspringairliverwarm and moistsanguinecourageous, hopeful, playful, carefree
Yellow bilesummerfirespleenwarm and drycholericambitious, leader-like, restless, easily angered
Black bileautumnearthgallbladdercold and drymelancholicdespondent, quiet, analytical, serious
Phlegmwinterwaterbrain/lungscold and moistphlegmaticcalm, thoughtful, patient, peaceful

Health could be maintained or restored by balancing the humors, and also by regulating air, diet, exercise, sleep, evacuation and emotion. Medical treatment consisted of enemas, bleeding, emetics (cause vomiting), laxatives (ease defecation), purgatives (strong laxatives), and cathartics (accelerate defecation).