釋禪波羅蜜次第法門 9.32

9.32

四、明九想趣道者，修九想有二種：若按事而修，此則但能伏欲界結，後別修十想以斷見思，成無學道。二者、若善修九想，即具十想，從事入理，此則不煩別約餘門修十想。所以者何？如行者觀人死時，動轉言語，須臾間忽然已滅，身體胮脹、爛壞、分散，各各變異，是則無常。若著此身，無常壞時，是即為苦。若無常苦不得自在者，是則無我。不淨、無常、苦、無我故，則世間不可樂著，觀身如是。

Fourth, explaining how the nine notions lead to the Path: There are two ways of cultivating the nine notions. If one cultivates according to phenomena, this can only subdue the fetters of the desire realm, and later one separately cultivates the ten notions to sever [the defilements of] views and thoughts, attaining the path of the arhat. Second, if one skillfully cultivates the nine notions, the ten notions are immediately complete within them; entering principle through phenomena, one need not bother to cultivate the ten notions by separate recourse to other gates. Why is this? For example, when the practitioner contemplates a person at the point of death, their movement and speech suddenly cease in an instant, their body swells, rots, and disperses, each undergoing transformation—this is impermanence. If one attaches to this body, when it is destroyed by impermanence, that is suffering. If impermanence and suffering lack autonomy, that is non-self. Because it is impure, impermanent, suffering, and non-self, the world cannot be delighted in or attached to; one contemplates the body in this way.