Synopsis
Mental Hygiene: Or, An Examination Of The Intellect And Passions, Designed To Illustrate Their Influence On Health And The Duration Of Life by William Sweetser. This mid-19th-century treatise argues that mind and body form a single living economy, whose health depends on prudent cultivation of both intellect and moral feelings. Divided into Part I, on Intellectual Operations, and Part II, on Passions, it surveys how thinking and emotional states affect the body's functions, longevity, digestion, circulation, and secretions. Sweetser emphasizes balanced mental labor, regular exercise, temperance, and varied occupations to avoid ennui and disease, and he warns against excessive early education or overtaxing the brain. He also stresses that moral dispositions—benevolence, self-discipline, and hope—support physical health, while passions such as anger, fear, grief, envy, and ambition can damage health but, when regulated by reason, can drive noble achievements. The work integrates physiology, psychology, education, and ethics to advocate a wholesome, purposeful life as the foundation of health and longevity. Through historical examples, classroom counsel, and clinical observations, the author links case histories with practical guidance for practitioners and parents.
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