That is what all poets do: they talk to themselves out loud; and the world overhears them. But it's horribly lonely not to hear someone else talk sometimes.
The tragic element in poetry is like Saturn in alchemy, the Malevolent, the Destroyer of Nature ; but without it no true Aurum Potabile, or Elixir of Life, can be made.
Not only every great poet, but every genuine, but lesser poet, fulfils once for all some possibility of language, and so leaves one possibility less for his successors.
The necessity of poetry has to be stated over and over, but only to those who have reason to fear its power, or those who still believe that language is 'only words' and that an old language is good enough for our descriptions of the world we are trying to transform.
I take as metaphysical poetry that in which what is ordinarily apprehensible only by thought is brought within the grasp of feeling, or that in which what is ordinarily only felt is transformed into thought without ceasing to be feeling.