The I, the I is what is deeplt mysterious. - Ludwig Wittgenstein

The limits of your world are the limits of your language

The form is the possibility of the structure.

In everyday language it very frequently happens that the same word has different modes of signification — and so belongs to different symbols — or that two words that have different modes of signification are employed in propositions in what is superficially the same way. Thus the word 'is' figures as the copula, as a sign for identity, and as an expression for existence; 'exist' figures as an intransitive verb like 'go', and 'identical' as an adjective; we speak of something, but also of something's happening. (In the proposition, 'Green is green' — where the first word is the proper name of a person and the last an adjective — these words do not merely have different meanings: they are different symbols.)