W. B. Yeats,
The Collected Works in Verse and Prose of William Butler Yeats…
“ If a song is brought into a play it does not matter to what school the musician belongs if every word, if every cadence, is as audible and expressive as if it were spoken. It must be good speech, and one must not listen to the musician if he promise to add meaning to the words with his notes, for one does not add meaning to the word ‘love’ by putting four o’s in the middle, or by subordinating it even slightly to a musical note. But where will one find a musician so mild, so quiet, so modest, unless he be a sailor from the forecastle or some ghost out of the twelfth century? ”
