華嚴經探玄記 13.52

13.52

三約大悲分別者，明諸外道求異解脫中，顯彼所求非想天等以為涅槃，菩薩觀之，但是有支緣生之法，非是無為涅槃常德，是故菩薩隨起大悲也。

Third, regarding differentiation by great compassion: in explaining the various non-Buddhists seeking a divergent liberation, it reveals that their sought-after heaven of neither-perception[-nor-non-perception] and so forth are considered nirvāṇa; the bodhisattva contemplates them and sees they are merely phenomena of dependent origination belonging to the branches of existence, not the constant virtue of unconditioned nirvāṇa; therefore, the bodhisattva accordingly gives rise to great compassion.