Interesting stuff. I can see your next collection being called: Mystagogue.
Yes you're right Wittgenstein wasted a lot of words to say very little. Of cause Descartes was profoundly wrong, he got the whole thing back to front and backwards. What he really should have said is: sum ergo cogito - I am; therefore, I think - much more satisfactory. Bishop Berkley was sublimely correct when he said: esse est percipi: to be is to be perceived, ipso facto, I think therefore, I am not what I think, (to put a slight twist on Descartes).
Jacques Lacan the famous psychoanalyst, said that existence could be understood through three interconnected 'registers' - the Symbolic, the Imaginary and a third register, which intersected the other two, which he called the Real. He thus postulated that the Real cannot be imagined or symbolized - which of cause indicates that Reality lies outside the realm of language and imagination. His hypothesis seems fairly reasonable to me. Our good friend Jacques, never accounted for a forth category the mystagogue - unfortunately, Lacan being somewhat a perfectionist tied his theory up in an elegant trinity of circles known as the Borromean Knot.
All this reminds me about the tetragrammaton - a composition of four letters that spell the name of God in the Hebrew language: YHWH and sometimes transliterated as IHWH. The important thing about the Name is that it is both unspeakable and incommunicable. Each letter traditionally signifies one of the four elements, so even though it remains outside of the ken of language: i.e. nothing 'conceivable or perceivable' as our friend Nisagadatta might very well say - it is the source from which all things, qualities and sensible properties flow. Just forget the religious connotations and trappings of that incomprehensible word and you might be able to see what I'm getting at.
As our good friend Huang Poe remarked in the ninth century: 'Forget all concepts. All that you have learned about truth is false.' A thousand years later the Romantics were espousing the same philosophy in their poetry.
Indeed, we don't have to go back to the Dark Ages to China to discuss this with a Chan Master - I feel we have a word in the Greek language which may suffice - a female counterpart to the mystagogue - her name is Cybele - High priestess to the Temple at Delphi.
It seems to me you have been struggling with this issue because there is no vocabulary available in the English language to describe your intuitions, you may have to perhaps resort to writing in Greek.
Anyway, I don't feel you're wasting your time - the mystagogue is a fascinating topic - well worth you giving your attention to it in poetry. Such endeavours will no doubt clarify for you the mystery, which is the mystagogue.
As I always say - 'all paths lead to Rome.'