俱舍論疏 27.95

27.95

論「詞無礙解至無尋伺故」，明依地也。上無尋、伺，同俗智性依地有別。《正理論》云「詞無礙解唯依二地，謂依欲界、初本靜慮。上諸地中無尋、伺故，彼地必無自語言故。此因非理。所以者何？非發語智名無礙解，勿無礙解定中無故。由此不應作如是說。無尋、伺故，上地中無，無斯過失，因義異故。何謂因義？謂此意言？尋、伺二法能發語故，相不寂靜自性麁動，上無此故寂靜微細。詞無礙解緣外言詞，亦不寂靜麁動類攝，是故此解上地中無。初靜慮中亦有尋、伺、故於定內亦有此解。由此極成、但依二地（已上論文）。」

On the Śāstra's statement: "The unimpeded comprehension of words ... because applied thought and sustained thought do not exist [there]": this clarifies the level it relies on. Above, there is no applied thought (vitarka) or sustained thought (vicāra); though they are identical in their nature as conventional knowledge, the levels they rely on differ. The Nyāyānusāra says: "The unimpeded comprehension of words relies only on two levels, namely relying on the desire realm and the first fundamental dhyāna. Because applied thought and sustained thought do not exist in the higher levels, those levels necessarily lack their own speech. This reason is illogical. Why is that? It is not that the knowledge that produces speech is called 'unimpeded comprehension', lest unimpeded comprehension be absent in meditative absorption. Therefore, one should not speak thus. [Objection:] 'Because applied thought and sustained thought do not exist, it is absent in the higher levels.' There is no such fault, because the meaning of the cause is different. What is the meaning of the cause? It means this intended speech: because the two factors of applied thought and sustained thought can generate speech, their characteristic is uncalm and their intrinsic nature is coarse and agitated; above, these do not exist, so [the mind there] is calm and subtle. The unimpeded comprehension of words takes external words as its object, which are also uncalm and subsumed under the coarse and agitated category; therefore, this comprehension is absent in the higher levels. In the first dhyāna, applied thought and sustained thought also exist, and thus this comprehension also exists within meditative absorption. Therefore, it is well established that it relies only on two levels (End of the Śāstra text)."