注大乘入楞伽經 6.155

6.155

言自聖智覺諸境界無實，如水中月，故無出入也。又云智性本明，固非生滅，但以離妄名生，妄覆言滅。如水淨月現、水濁影沈，而月性常爾，本無出入也。

This means that one's own noble wisdom awakens to the fact that all objective realms lack reality, like the moon in water, and thus there is neither exiting nor entering. It also says that the nature of wisdom is inherently luminous and certainly not subject to arising and ceasing; it is only termed 'arising' when free of delusion, and called 'ceasing' when obscured by delusion. Just as when water is clear the moon appears, and when water is turbid the reflection is submerged, yet the nature of the moon remains constantly so, originally having neither entering nor exiting.