The eye can't see inside of itself. The metaphor breaks down though, because the inside of an eye are in principle _seeable_ (mirrors and microscopes etc), whil

The eye can't see inside of itself. The metaphor breaks down though, because the inside of an eye are in principle _seeable_ (mirrors and microscopes etc), while the "nature of language" or whatever, is in principle _unspeakable_ , no so much as a coherent thing to ask after.