Sometimes when I sit down to practice and there is no one else in the room, I have to stifle an impulse to ring for the elevator man and offer him money to come in and hear me.
Source: Holiday, May 1963.
-- Artur Rubinstein, (Jan 28 1887-1982), Polish-US virtuoso pianist; He was regarded by many as the 20th century's foremost interpreter of the repertoire.