起信論疏筆削記 20.8

20.8

四中，論　不淨等者，《淨名》云：是身不淨，穢惡充滿。然有五種：一、種子不淨，父精母血之所成故。二、住處不淨，生熟二藏中間住故。三、自體不淨，三十六物共和合故。三十六者，外相三四醜，謂髮毛爪齒睇淚涕唾垢汗便利；身器二六成，謂皮膚血肉筋脈骨髓肪膏腦膜；中含十二穢，謂脾腎心肺肝膽腸胃赤痰白痰生熟二藏。四、自相不淨，九孔常流諸穢惡故。五、究竟不淨，身壞命終不可堪故。形骸若斯，復何可樂？疏　除四倒者，常樂我淨是凡夫所執四種顛倒，故今以無常等四觀一一對治，如以四藥治於四病。

Under the fourth, the Śāstra says: "Impure, etc.": the Vimalakīrti-nirdeśa says: "This body is impure, filled with filth and evil." Now there are five kinds: first, impurity of seed, because it is formed from the father's semen and the mother's blood; second, impurity of dwelling place, because it dwells between the stomach and the intestines; third, impurity of nature, because thirty-six substances combine together. As for the thirty-six: the external marks are three times four ugly things, namely hair, bodily hair, nails, teeth, rheum, tears, snivel, saliva, filth, sweat, feces, and urine; the vessel of the body is composed of two times six, namely skin, flesh, blood, sinews, pulse, bones, marrow, fat, grease, brain, and membrane; the interior contains twelve foul items, namely spleen, kidneys, heart, lungs, liver, gallbladder, intestines, stomach, red phlegm, white phlegm, the stomach, and the intestines. Fourth, impurity of intrinsic marks, because the nine apertures constantly discharge various foul evils; fifth, ultimate impurity, because when the body breaks up and life ends, it is unbearable. With a physical form like this, what can be delighted in? The Commentary says: "Eliminating the four inversions": permanence, pleasure, self, and purity are the four kinds of inversions clung to by ordinary beings; therefore now, with the four contemplations of impermanence and the rest, they are counteracted one by one, just as four medicines cure four illnesses.