大般涅槃經義記 6.75

6.75

次明無法，句別有四：一明其人，「雖知於法，無法無礙」；二「何以」下釋無所以，緣覺知字，無字無礙，為是無之；三「何以」下辨，前無字無礙，所以不知常住二字故無；四「是故」下結。

Next, it clarifies their lack of [knowledge of] dharmas, with four distinct clauses: first, it clarifies of such a person that "although they know dharmas, they lack unobstructed knowledge of dharmas"; second, from "Why?" onward, it explains the reason for its absence: pratyekabuddhas know syllables, yet lack unobstructedness regarding syllables, and therefore lack it; third, from "Why?" onward, it explains: regarding the previous lack of unobstructedness regarding syllables, the reason is that they do not know the two syllables "permanence" and "abiding," and thus lack it; fourth, from "Therefore" onward, it concludes.