瑜伽論記 23.220

23.220

又於此中，若諸苾芻，為離欲貪已下，第三明修空位，修空位有三：一、見道已前，二、在有學，三、在無學，見道已前初修外空。由我慢門心，不流散等隨觀察者，由為我故，勵力修空心不流散；以寂靜相下，次觀內空；遂於內外已下，第三修無我見；乃於已下，第四修無常見，無常見無我見，為因名不動界，界是因義故；由於是處心無勝解已下，明有學位修空，或緣不淨等多種觀察，乃至於一切處皆能證入也；由是因緣，於所證空，能證圓滿已下，明無學位證空圓滿，除上分下分結盡。

Furthermore, from 'herein, if bhikṣus, in order to separate from desire and greed' downward, the third part clarifies the stages of cultivating emptiness. The stages of cultivating emptiness are three: first, prior to the path of seeing; second, in the stage of one in training; third, in the stage of one beyond training. Prior to the path of seeing, one first cultivates external emptiness. Regarding 'observing closely through the gateway of the pride of "I" so that the mind is not scattered,' and so forth: because it is for one's own sake, one exerts effort to cultivate emptiness so that the mind is not scattered; from 'by means of peaceful and calming marks' downward, one next contemplates internal emptiness; from 'thereupon, regarding internal and external' downward, one thirdly cultivates the view of selflessness; from 'further, regarding' downward, one fourthly cultivates the view of impermanence; the view of impermanence and the view of selflessness, serving as causes, are called the 'immovable element', because 'element' has the meaning of cause. From 'because the mind lacks resolute conviction in that place' downward, it clarifies the cultivation of emptiness in the stage of one in training: whether focusing on impurity or various other contemplations, up to being able to realize and enter into all places; from 'by this condition, regarding the emptiness to be realized, being able to realize perfection' downward, it clarifies the perfection of realizing emptiness in the stage of one beyond training, completely eliminating both the higher and lower fetters.