俱舍論記 30.164

30.164

「此涅槃宮至不能覩」者，此即第二讚道不覩。大涅槃眾聖所居，名涅槃宮。無我大路趣涅槃宮，名一廣道。此一廣道，千聖所遊，即無我性。此無我道，諸佛如日，其言似光，所照無我大道，顯諸外等由無勝慧，雖開昧眼而不能覩。或無我道，諸佛日言光明所照，雖後復開僻見昧眼而不能覩。

Regarding "This palace of nirvāṇa … cannot see": this is the second: praising the path that is unseen. The dwelling of the multitude of noble ones in great nirvāṇa is called the palace of nirvāṇa. The great avenue of selflessness leading to the palace of nirvāṇa is called the one broad path. This one broad path is traversed by a thousand noble ones, which is the nature of selflessness. This path of selflessness is illuminated by the sun of the Buddhas, whose words are like light illuminating the great path of selflessness, showing that non-Buddhists and the like, lacking superior wisdom, cannot see even though they open their dim eyes. Or: the path of selflessness is illuminated by the light of the sun-like words of the Buddhas, yet even though they subsequently open their dim eyes of biased views, they cannot see it.