譬似而非者。智度論十八曰：「譬如牛乳驢乳其色雖同，牛乳枰則成蘊，驢乳枰則成糞。佛法語及外道語，不殺不盜，慈愍眾生。攝心離欲，觀空雖同。然外道語初雖似妙，窮盡所歸，則為虛誑，一切外道皆著我見。」
The milk of cow and ass, the one turns to 'curd', the other to 'dung ', i. e. alike in appearance, but fundamentally different, as is the case with the Buddha's teaching and that of outsiders.