Hearing a wonderful piece is not enough
One must be able to play it
Being able to play it once is not enough
One must be able to master it
Mastering a piece perfectly is not enough
One must be able to perform it
Performing it to others is not enough
One must be able convey it
Conveying it by touching others is not enough
One must be able to teach it
Teaching it to others is not enough
Others must be able to hear it
Hearing a wonderful piece is not enough
One must be able to play it