You cannot lecture on really pure poetry any more than you can talk about the ingredients of pure water-it is adulterated, methylated, sanded poetry that makes the best lectures.
If a writer of prose knows enough about what he is writing about he may omit things that he knows and the reader, if the writer is writing truly enough, will have a feeling of those things as strongly as though the writer had stated them. The dignity of movement of an iceberg is due to only one-eighth of it being above water. A writer who omits things because he does not know them only makes hollow places in his writing.
Then from the neighboring thicket the mocking-bird, wildest of singers, Swinging aloft on a willow spray that hung o'er the water, Shook from his little throat such floods of delirious music, That the whole air and the woods and the waves seemed silent to listen.
While it is all very well to distinguish happiness that is transient from that which is lasting, between ephemeral and genuine happiness, the only happiness it is meaningful to speak of when a person is dying from thirst is access to water.
Too much of water hast thou, poor Ophelia, And therefore I forbid my tears: But yet It is our trick; nature her custom holds, Let shame say what it will: when these are gone, The woman will be out. — Adieu, my lord! I have a speech of fire, that fain would blaze, But that this folly drowns it.