金剛三昧經論 1.77

1.77

論曰：此中先顯道理、後正對問。顯道理者，得無住時，無生之心心常寂滅無有出觀，達本無起亦非始入，以之故言心無出入。如是觀心既無出入，即是本覺如來藏心，是明始覺即同本覺。此無生心既是本藏，本來性寂不復起動，云何得有入出起息？此言重成無出入義。

The commentary says: Herein, it first reveals the principle, and later directly responds to the question. Revealing the principle: when one attains non-abiding, the unarisen mind is constantly quiescent and extinguished without any emerging from contemplation; realizing that fundamentally there is no arising, it also does not newly enter; for this reason it says, "the mind has no going out or coming in." Since such a contemplative mind has no going out or coming in, it is precisely the innate awakening of the tathāgatagarbha mind; this clarifies that initial awakening is identical to innate awakening. Since this unarisen mind is precisely the fundamental storehouse, fundamentally quiescent by nature and not moving or activating anymore, how could there be entering and emerging, activation and cessation? These words reiterate and establish the meaning of having no going out or coming in.