首楞嚴義疏注經 3.445

3.445

無圓實智故名昏，不了常遍故稱迷。若虛空性有出入等，則體非常，亦無遍義，豈名為大？故勸詳審也。

Lacking perfect and real wisdom is called 'deluded'; not understanding permanence and ubiquity is called 'confused'. If the nature of empty space had coming out, entering, and the like, its substance would not be permanent, nor would it have the meaning of ubiquity; how could it be called 'great'? Hence he exhorts him to examine carefully.