起信論疏筆削記 12.22

12.22

顯不變。論　常無念者，無念即覺義。既常是覺，即無不覺。無不覺故，名為不變。疏　雖舉等者，如杌不作鬼、繩不為蛇、東處無西等。緣起因體，即前自性淨心，是此緣起體也，故云心性。

Revealing non-change. The Śāstra states: "Constantly thoughtless": thoughtlessness is precisely the sense of enlightenment. Since it is constantly enlightenment, there is no non-enlightenment. Because there is no non-enlightenment, it is named "unchanging." Commentary: "Although advancing..." and so on: just as a tree stump does not become a ghost, a rope does not become a snake, and the eastern direction has no west, etc. The causal essence of dependent origination is the aforementioned naturally pure mind, which is the essence of this dependent origination; hence it is called "the nature of mind."