首楞嚴義疏注經 1.534

1.534

五境不對、明了不行，既絕外緣，故云內守幽閑也。當爾之時不無分別，若便將此內分別心為全性者，此亦非理，而不知此全由第六法塵影像事境所發，亦非全性，乃是意識在獨散位，比量別緣，取獨影境，非是明了同五所取，故云縱滅見聞覺知也。

When the five objects are not present and clear awareness does not operate, having cut off external conditions, it is said: 'internally guard quietude.' At that very time discrimination is not absent; if one directly takes this internal discriminating mind to be the complete nature, this too is unreasonable. One does not know that this entirely arises from the shadow-objective-state of the sixth dust of dharmas and is also not the complete nature; it is merely the mental consciousness in a solitary, scattered state, separately conditioning by inference and grasping solitary shadow objects, not being clear awareness grasping together with the five [consciousnesses]. Hence it says: 'even if you extinguish seeing, hearing, sensing, and knowing.'