The Tractarian Wittgenstein says that there is the Inexpressible. But what is inexpressible? Presumably, if there is the Inexpressible then there must be a quid answering to the est. Could there be truths that cannot be expressed? A truth is a true truth-bearer, a true sentence, proposition, judgment, statement, assertion, belief, asseveration, belief, claim, etc. But these all — different as they are among themselves — involve expression, articulation, objectification. An inexpressible truth amounts to an inexpressible expression. More precisely: an inexpressible truth is something that is both expressible inasmuch as it is a truth but also inexpressible inasmuch as it is — inexpressible.
And therein lies a problem for our mystical positivist. In this connection Theodor Adorno speaks of Wittgenstein's indescribable spiritual vulgarity.