“When music reminded me of something which was not music, I supposed it was getting me somewhere. ‘How like Monet!’ I thought when listening to Debussy, and ‘How like Debussy!’ when looking at Monet. I translated sounds into colours, saw the piccolo as apple-green, and the trumpets as scarlet.”

—E.M. Forster, Not Listening to Music, from Two Cheers for Democracy, 1939.