A good conductor ought to be a good chauffeur; the qualities that make the one also make the other. They are concentration, an incessant control of attention, and presence of mind; the conductor only has to add a little sense of music.

Quoted in Oskar von Riesemann (trans. Dolly Rutherford) Rachmaninoff's Recollections (New York: Macmillan, 1934) p. 155.