"Every revolution in poetry is apt to be, and sometimes to announce itself to be a return to common speech. That is the revolution which Wordsworth announced in his prefaces, and he was right; but the same revolution had been carried out a century before by Oldham, Waller, Denham and Dryden; and the same revolution was due again something over a century later. The followers of a revolution develop the new poetic idiom in one direction or another; they polish or perfect it; meanwhile the spoken language goes on changing, and the poetic idiom goes out of date... No poetry of course is ever exactly the same speech that the poet talks or hears : but it has to be in such a relation to the speech of his time that the listener or reader can say 'that is how I should talk if I could talk poetry.' This is the reason why the best contemporary poetry can give us a feeling of excitement and a sense of fulfillment different form any sentiment aroused by even very much greater poetry of a past age.
"The music of poetry, then, must be a music latent in the common speech of its time..."
- T.S. Eliot, "The Music of Poetry" (1942)