瑜伽論記 18.567

18.567

言空解脫門八智所攝等者，除世俗及他心智，此空門智欲入真如觀時，先觀諸法空及無我義，當八智如觀，四諦空無我即義當苦等四智觀，下欲界空義當法智觀，上二界空義當此智，在無學身即是盡無生二智，是知八智相應定數為空解脫門。

Regarding 'the gate of liberation through emptiness is subsumed under eight cognitions, etc.': excluding conventional cognition and the cognition of others' minds, when this cognition of the emptiness gate wishes to enter the contemplation of tathatā, it first contemplates the meaning of the emptiness and selflessness of all phenomena, corresponding to the contemplation of the eight cognitions. The emptiness and selflessness of the four truths corresponds in meaning to the contemplation of the four cognitions of suffering and so on; the emptiness of the lower desire realm corresponds in meaning to the contemplation of the dharma-cognition; the emptiness of the upper two realms corresponds in meaning to this [subsequent] cognition; in the body of an aśaikṣa, these are precisely the two cognitions of exhaustion and non-arising. Thus, one knows that the mental factors of meditative absorption associated with the eight cognitions constitute the gate of liberation through emptiness.