The Imagination and Poetry

I have often thought about Faulkner's Nobel Prize for Literature acceptance speech which I reread from time to time. What strikes me about the speech is near the ending when he says 'That man will not only endure, he will prevail.' This has been my curiosity towards writing and the imagination. It is this optimistic sense that mankind will always find a language to reveal his imagination. The writing contained is an expression of this;

...need i say more?

...and as we approach the unsaid–
the darkness cooler than black,
the truth beyond white,
the sound still stiller than all silences;
a language must hold; a vocabulary–
with strange vowels & odd consonants must be
to evoke the imagination. And
within the closed casket there is such sound–
a murmur, perhaps, a small stirring.
The continuum of the human cry, the shrill– poetry–
to penetrate...and the human need, the want,
to say more, say more, say more, still...