Someone or other has suggested that Blake's "fearful symmetry" refers not to the two halves of the tiger but to the correspondence between the tiger and its creator. That is certainly suggested by the couplet: "Did he smile his work to see?/ Did he who made the Lamb make thee?" Wittgenstein seems to have had a somewhat similar idea. Anne-Marie Christensen provides this translation of a passage from MS 136 (dated 1948):
We learn the meaning, the use of words in particular circumstances...Do I here have to state all of the circumstances? Does it not suffice that I say: "These concepts do not work here any longer"? (Just as we cannot use the moral concepts of a being that has created the hippopotamus and the crocodile.)I don't have anything to say about this, but it's a wonderful thought.