She had been to the conservatory in The Hague. She was a professional musician; she knew that making music was not about expressing emotions but about evoking them: and that could only succeed when it was done professionally-that is, dispassionately, like a surgeon operating, regardless of theatrical grimaces conductors and soloists often pulled when they knew they were being watched. At home or in rehearsal, they never pulled those faces, nor did orchestral musicians, because those were the faces of listeners.
- from The Discovery of Heaven by Harry Mulisch