大方廣佛華嚴經隨疏演義鈔 60.98

60.98

疏「後二約病」者，初一少時病、後一老時病。言「病因」者，樂受生貪，則房色竭其骨髓，滋味煎其腸藏，安得不病？苦受生瞋，則憤恚填於心胸，不思危難，安不病哉？癡則愚暗，不識是非，動皆顛墜，安不病哉？九中，然老亦病因，而不云因者，老亦即病，謂年耆根熟、形變色衰，飲食不能、氣力虛微，坐起苦極、餘命無幾，豈非病哉？況加客病，難復再康，枯柳遭霜生茂無日，隨風墜葉歸樹何期。

Regarding the commentary's "The last two concern sickness": the first is sickness in youth, and the second is sickness in old age. As for "the cause of sickness": pleasant feeling generates greed, so sexual indulgence exhausts the bone marrow and rich flavors scorch the intestines—how could one not become sick? Painful feeling generates anger, so fury and resentment fill the heart and chest, without regard for danger and disaster—how could one not become sick? Delusion is foolish darkness, not recognizing right from wrong, falling into errors at every move—how could one not become sick? In the ninth, however, old age is also a cause of sickness, yet it is not called a cause because old age is itself sickness: that is, when age is advanced and the faculties are decrepit, the form changes and vigor declines, eating and drinking are impossible, breath and strength are deficient, sitting and standing are extreme suffering, and little of life remains—how is this not sickness? How much more so when adventitious illness is added, making it difficult to recover health: a withered willow beset by frost has no day to flourish anew; a fallen leaf following the wind, what hope has it of returning to the tree?