In a letter from John Keats* ~
"In Poetry I have a few Axioms, and you will see how far I am from their Centre.  [referring to his poem endymion] 1st. I think Poetry should surprise by a fine excess and not by Singularity ~ it should strike the Reader as a wording of his own highest thoughts, and appear almost a Remembrance.

~ 2nd. Its touches of Beauty should never be half way ther[e] by making the reader breathless instead of content:  the rise, the progress, the setting of imagery should like the Sun come natural to him ~ shine over him and set soberly although in magnificence leaving him in the Luxury of twilight ~ but it is easier to think what Poetry should be than to write it ~ and this leads me on to another axiom.  That if Poetry comes not as naturally as the Leaves to a tree it had better not come at all.  However it may be with me I cannot help looking into new countries with 'O for a Muse of fire to ascend!' ~  If Endymion serves me as a Pioneer perhaps I ought to be content."

John Keats by Wm. Hilton.  National Portrait Gallery, London**

* 27 February, 1818, to John Taylor.  John Keats, English Romantic Poet (1795 - 1821)
** Wikipedia

~ Selected Poems and Letters by John Keats, Edited by Douglas Bush, Houghton Mifflin Company, 1959

"When I awoke, 'twas in a twilight bower;
Just when the light of morn, with hum of bees,
Stole through its verdurous matting of fresh trees.
How sweet, and sweeter! for I heard a lyre,
And over it a sighing voice expire.
It ceased ~ I caught light footsteps; and anon
The fairest face that morn e'er look'd upon
Push'd through a screen of roses.  Starry Jove!
With tears, and smiles, and honey-words she wove
A net whose thraldom was more bliss than all
The range of flower'd Elysium.  Thus did fall
The dew of her rich speech: 'Ah! Art awake?"

~from  Endymion:  A Poetic Romance, Book III