金光明經文句記 6.44

6.44

初、通內外釋。春動肝病等者，肝藏屬木，木春王則可治；脾屬土，木剋土，故脾難治。心藏屬火，火夏王則可治；肺屬金，火剋金，故肺難治。肺屬金，金秋王則可治；金剋於木，故肝難治。腎屬水，水冬王則可治；水剋於火，故心難治。

First, an explanation covering both the internal and external. Liver diseases flaring up in spring and so forth: the liver organ belongs to wood; when wood flourishes in spring, it can be treated; the spleen belongs to earth, and wood overcomes earth, so the spleen is difficult to treat. The heart organ belongs to fire; when fire flourishes in summer, it can be treated; the lungs belong to metal, and fire overcomes metal, so the lungs are difficult to treat. The lungs belong to metal; when metal flourishes in autumn, they can be treated; metal overcomes wood, so the liver is difficult to treat. The kidneys belong to water; when water flourishes in winter, they can be treated; water overcomes fire, so the heart is difficult to treat.