I have spent my life in clearing out of poetry every phrase written for the eye, and bringing all back to the syntax that is for the ear alone.
"Write for the ear," I thought, "so that you may be instantly understood, as when actor or folk-singer stands before an audience."
—W. B. Yeats, “An Introduction for My Plays” (1937, but not published until 1961 in Essays & Introductions).
[n.b.: I went to a presentation by Deanie Rowan Blank on W.B. Yeats today at the Hartford Public Library, and this quote came up. So I ran down the source and posted it.]