摩訶止觀 8.90

8.90

又常止心於足者，能治一切病。何故爾？五識在頭，心多上緣，心使風，風動火，火融水，水潤身，是故上分調而下分亂以致諸病，或脚足攣躄等。又五藏如蓮華，靡靡向下，識多上緣，氣強衝府藏，翻破成病。心若緣下，吹火下溜，飲食鎖化，五藏順也。止心於足最為良治，今常用，屢有深益，以此治他往往皆驗。蔣、吳、毛等，即是其人。

Furthermore, constantly calming the mind at the feet can cure all diseases. Why is this? The five consciousnesses are in the head, and the mind mostly directs its attention upward; the mind commands the wind, the wind stirs the fire, the fire melts the water, and the water moistens the body; therefore, the upper part is regulated while the lower part is disrupted, leading to various diseases, or spasms and paralysis of the legs and feet, and the like. Moreover, the five viscera are like lotus blossoms drooping downward; when consciousness mostly directs its attention upward, strong qì surges against the viscera and bowels, overturning and damaging them to cause disease. If the mind directs its attention downward, it blows the fire to descend, food and drink are locked and transformed, and the five viscera are compliant. Calming the mind at the feet is the finest cure; I constantly use it and repeatedly gain profound benefit; when using it to treat others, it has frequently proved effective. Jiang, Wu, Mao, and others are such individuals.