維摩經玄疏 1.159

1.159

不可說者，一往雖同，解其義趣，實不相混。末代坐禪、聽講，於此不了，聞不可說，便生混亂。此即鎮頭、迦羅二果難分別也。若別此義，身子淨名，尚不為類；外道凡夫，豈為等乎？

Although the ineffables are superficially the same, when one understands their purports, they truly do not confound one another. In the degenerate age, those who sit in meditation and listen to lectures are not clear about this; hearing 'ineffable,' they become confused. This is like the difficulty of distinguishing between the tinduka and kālānusārya fruits. If one distinguishes this meaning, Śāriputra and Vimalakīrti are not even of the same category; how could non-Buddhists and ordinary people be equated with them?