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.
It is a curious thing how poets tend to become ascetics.... Even a debauch for them is a self-flagellation. They go on the loose in cruelty against themselves, admitting that they are pandering to, and despising, the lower self.
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.
Therefore we value the poet. All the argument and all the wisdom is not in the encyclopedia, or the treatise on metaphysics, or the Body of Divinity, but in the sonnet or the play.
I have said that poetry is the spontaneous overflow of powerful feelings: it takes its origin from emotion recollected in tranquillity: the emotion is contemplated till, by a species of reaction, the tranquillity gradually disappears, and an emotion, kindred to that which was before the subject of contemplation, is gradually produced, and does itself actually exist in the mind.
What a poem means is as much what it means to others as what it means to the author; and indeed, in the course of time a poet may become merely reader in respect to his own works, forgetting his original meaning.
I had rather be a Kitten, and cry mew, Than one of these same Meeter Ballad-mongers: I had rather heare a Brazen Candlestick turn'd, Or a dry Wheele grate on the Axle-tree, And that would set my teeth nothing an edge, Nothing so much, as mincing Poetrie.