俱舍論記 2.34

2.34

「如無男根至依處亦無」者，前師復救。顯根有用，引例證成。如無男根亦無依處，若二根無者，依處亦應無。既有依處，顯根有用。雖非有見，為有見因；雖非起言，為起言因。展轉相因，根還有用。由有根故依處方生，由依處生嚴身起說。

Regarding the passage: "Just as without the male faculty […] the physical base also does not exist," the previous master rescues [his position] again. To show that the faculties have a use, he adduces an analogy to prove it. Just as without the male faculty there is also no physical base, if the two faculties did not exist, their physical bases should also not exist. Since their physical bases do exist, this shows that the faculties have a use. Although not being visible, they serve as the cause for what is visible; although not initiating speech, they serve as the cause for initiating speech. As causes for one another in turn, the faculties still have a use. It is because the faculties exist that the physical bases are produced; because the physical bases are produced, they adorn the body and initiate speech.