As we've staid elsewhere, this is a poem is about poetry. But what exactly is it about poetry that makes it poem-worthy? Or, in this case, proem-worthy?
Well, to begin with, the poem tries to capture what the feeling of poetry is, and decides on vertigo. Then it tells what poetry does: it breaks rules, puts words onto the empty page, and despairs through solitude.
Finally, it tells what poetry is: it's self-aggrandizing, it's working with words, it's what brings us the illusions of what is real. And in the end, poetry is words: organic, growing, living words.