釋禪波羅蜜次第法門 9.33

9.33

食雖在口，腦涎流下，與唾和合成味，而咽與吐無異，下人腹中即為糞穢，即是食不淨想。以此九想觀觀身無常變易，念念皆滅，即是死想。以是九想厭世間樂，知煩惱斷，即安隱寂滅，即是斷想。以是九想遮諸煩惱，即離想。以九想厭世間故，知五陰滅，更不須生，是處安隱，即是盡想。若能如是善修九想，即具十想，斷見、思惑，當知是人必定趣三乘道。

Although food is in the mouth, nasal fluid flows down, mixing with saliva to form a flavor; swallowing is no different from vomiting, and once it enters the stomach, it becomes feces and filth—this is the notion of the impurity of food. Using this contemplation of the nine notions to contemplate the body as impermanent, changing, and ceasing moment by moment is the notion of death. Using these nine notions to turn away from worldly pleasure, knowing that the afflictions are severed, which is peaceful and quiescent, is the notion of abandoning. Using these nine notions to ward off the afflictions is the notion of dispassion. Because the nine notions turn one away from the world, knowing that the five aggregates cease and need not arise again, and that this place is peaceful, is the notion of cessation. If one can skillfully cultivate the nine notions in this way, the ten notions are complete, severing the afflictions of views and thoughts; know that such a person will definitely progress toward the path of the three vehicles.