All parts of the body which have a function, if used in moderation and exercised in labors in which each is accustomed, become thereby healthy, well developed and age more slowly, but if unused they become liable to disease, defective in growth and age quickly.
Positive health requires a knowledge of man's primary constitution and of the powers of various foods, both those natural to them and those resulting from human skill. But eating alone is not enough for health. There must also be exercise, of which the effects must likewise be known. The combination of these two things makes regimen, when proper attention is given to the season of the year, the changes of the wind, the age of the individual, and the situation of his home. If there is any deficiency in food or exercise, the body will fall sick.
It is better not to apply any treatment in cases of occult cancer; for if treated (by surgery), the patients die quickly; but if not treated, they hold out for a long time.
It is changes that are chiefly responsible for diseases, especially the greatest changes, the violent alterations both in the seasons and in other things. (:)...regimen and temperature, and one period of life to another.
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