仁王護國般若波羅蜜多經疏 2.76

2.76

解曰：文字性離無文字相者，明能詮教。言文字者，表詮。諸法無自性故，故云性離。以性離故，即無相也。故《淨名》云「文字性離，即是解脫。」言非法者，文字空故。非非法者，離相所詮，體非無故。又非法者，所詮理智非有相故。非非法者，是所修證，不同兔角，非無法故。由教及理俱離二邊，故無上矣。從此第四智慧無上。於中分三：且初第一明般若空。

Exposition: "Letters are by nature detached and without the marks of letters" clarifies the teaching that expresses. "Letters" express. Because all dharmas are devoid of self-nature, it is said that "they are by nature detached." Because they are by nature detached, they are without marks. Therefore the Vimalakīrti Sūtra says: "The nature of letters being detached is itself liberation." "Neither dharma" is because letters are empty. "Nor non-dharma" is because what is expressed, detached from marks, is not non-existent in substance. Furthermore, "neither dharma" means that the principle and cognition that are expressed do not have existent marks. "Nor non-dharma" means that it is what is cultivated and realized, not like a rabbit's horn, and is not a non-existent dharma. Because both the teaching and the principle are free from the two extremes, they are supreme. Next is the fourth: the supremacy of wisdom. This is divided into three: first, clarifying that prajñā is empty.