妙法蓮華經玄義 8.36

8.36

歷諸教分別經者，若言理絕文字，文字是世俗，寄字詮理，理可是經，文字非經，六塵等皆是經詮，非正經也，此即三藏中經耳。若無離文字說解脫義，文字性離即是解脫，六塵即實相，無二無別，如上所說者，圓教中經也。帶三方便作此說者，方等中經也。帶二方便如此說者，般若中經也。帶一方便作如此說者，華嚴中經也。

As for distinguishing the sūtra throughout the various teachings: if one says that the principle is beyond words and characters, that words and characters are conventional, that words are relied upon to explain the principle, that the principle can be the sūtra while words and characters are not the sūtra, and that the six sense data and so forth are all explanations of the sūtra and not the sūtra proper—this is merely the sūtra according to the Tripiṭaka [teaching]. If there is no explanation of the meaning of liberation apart from words and characters, if the intrinsic nature of words and characters being free is itself liberation, and if the six sense data are identical with the true mark, without duality or difference, as explained above—this is the sūtra according to the perfect teaching. Making this explanation while bearing the three provisional expedients is the sūtra according to the Vaipulya. Making this explanation while bearing two provisional expedients is the sūtra according to the Prajñā. Making this explanation while bearing one provisional expedient is the sūtra according to the Avataṃsaka.