How do I produce the effects which I obtain from the piano? … In answer I would say I produce them by listening, criticizing, judging—working over the point, until I get it as I want it. Then I can reproduce it at will, if I want to make just the same effect; but sometimes I want to change and try another.

Quoted in Piano Mastery: Talks with Master Pianists and Teachers (1915) by Haeriette Brower