an arbitrary system of grunts and squeals

Man knows that there are in the soul tints more bewildering, more numberless, and more nameless than the colours of an autumn forest… Yet he seriously believes that these things can every one of them, in all their tones and semitones, in all their blends and unions, be accurately represented by an arbitrary system of grunts and squeals. He believes that an ordinary civilized stockbroker can really produce out of this own inside noises which denote all the mysteries of memory and all the agonies of desire.
~ G.K. Chesterton