As related by Mark Potter:
There was once a family of mice. They lived in this grand piano. And they had lived there for many generations of mice. Nobody knew that they lived inside the grand piano, but these mice, this family of mice, for many generations had loved living on the inside of the grand piano.
The reason why they loved this so much was because they thrilled to the music of the Grand Musician. They never knew quite when he was going to play but when he would play the mice loved it.
And then one day this intrepid mouse climbed up into a part of the piano where no other mouse had ever dared to go before, and he came back with a report. And he said, "Oh, dear family of mice! My brothers and sisters, aunts and uncles, cousins, mother and father. There is no Grand Musician!
"There are only hammers."