Wow you raise some interesting thoughts. My biggest reaction was to your line, "That sanity is in being an idiot!"... and it turned all the lights on. Dostoevsky somewhat unsuccessfully tried to write a [chrisitan??} contextualized phenomenlogy of the Idiot in his novel entitled the Idiot. I suspect his book was the christian variation of the idiot.

I haven't read that particular book for over 40 years but do have a general if unwritten field theory of Dostoevsky in my mind......So i will let my imagination carry me onwards from here.... The idiot could just as easily be rendered as the fool. In my mind I envisage the fool as being the prototype for individuality itself. Promethues/epimetheus was the titanic equivalent of the fool. Forethought and lack of forethought. I believe the lack of forethougtht is the first mover in the fools itineray... Foolishness or individuality ...the fool leads us off into the unknown and or resolves to deal with insoluble questions emanating from the unknown... the idiot goes first but the promethian element of the concept of the fool follows afterwards and learns from the epimethian foolishness. How else do we approach the unknown but as fools not knowing the way. Let's leap forward to the Olympian version of the Promethian/epimethian construct. And there you find Hephaistos a complete idiot if there ever was one. Who else in their right mind would leave the secure confines of the herd and singlehandedly create his own individual solution to life and its problems. Who in their right mind would totally challenge the authority and power of his mother Hera.... and win... or what about the fool marrying aphrodite and expecting her to be faithful. and the fool triumphed over aphrodite in the end..Hephaistos foolish behavior was cause of much merriment amongst the Olympians. But Individuality has its strengths as well and Hephaistos renoun as a craftsman was renowned in the Olympian realm. Swinging back to dostoevsky i would suspect...we are only imagining here....... his fool is the christian fool trying to make sense of the Christian civilization/mileau that he encounters. Whereas in hindsight his solution as embodied in the Brothers Karamazov is the forethought that follows the idiots foolish foray into the heart of the christian mileau...the unknown/unsaid/uninterpreted element of the christian civilization which contains us.. 

I  agree with the tenor of your following thoughts .. i only added my own prologue to them ...

"all is idiocy!  That sanity is in being an idiot!  That pomposity is so evident in many instances; and humility of failure so true and real, without all the fantasy!  Sorry about the seeming judgmental words!  But, it seems that one way or another, each writer/in-depth inquirer of the "unknown" is at once seeking a TRUTH, revealed but not yet known?  concluding that the SILENCE of not-knowing or having the solution to the problems approached in one's life/ or the question of LIFE in general is met not only in the inquiry, but in the letting go of the inquiry, and simply living LIFE, gratefully!"

I would like to add that dostoevsky as the psychologist of our christian civilization wrote the problematical phenomenology of the offspring of our christian culture and civilization. I will leave it there or it will take me a book to explain my intuition...Minds without content prefer to focus on the form of expression. you obviously are more interested in ideas than in form. 

Thank you for taking an interest in one of my postings. I posted a number of posts on this topic on the thread you refer to and some of the others. Dostoevsky had faith. Well at least he did after Crime and Punishment. Jung inherited a lack of faith from his father who was a pastor and who was no longer graced with the ability to believe in the precepts of his religion. Jung became the modern man in search of a soul. In the end he answered the question of do you believe in God with words to the effect of I don't believe there is a God... I know .. I know there is a God. Dostoevsky was the great psychologist of modern christian civilization and Jung was the greatest psychologist of the soul. That is my story and I'm sticking to it.