According to traditional reading of the Tractatus, Wittgenstein's views about logic and language led him to believe that some features of language and reality cannot be expressed in senseful language but only "shown" by the form of certain expressions. Thus for example, according to the picture theory, when a proposition is thought or expressed, the proposition represents reality (truly or falsely) by virtue of sharing some features with that reality in common. However, those features themselves is something Wittgenstein claimed we could not "say" anything about, because we cannot describe the relationship that pictures bear to what they depict, but only show it via fact stating propositions (TLP 4.121). Thus we cannot say "that" there is a correspondence between language and reality, but the correspondence itself can only be "shown", since our language is not capable of describing its own logical structure.