"To be emotional in musical interpretation, yet obedient to the initial tempo and true to the metronome, means about as much as being sentimental in engineering. Mechanical execution and emotion are incompatible. To play Chopin's G major Nocturne with rhythmic rigidity and pious respect for the indicated rate of movement would be as intolerably monotonous, as absurdly pedantic, as to recite Gray's famous Elegy to the beating of a metronome."