The Parable of the Keyboard
A man plays a very tiny keyboard, perhaps only two octaves wide. He wants to hit low notes and he wants to hit high notes, but he cannot. While playing a tune, the man moves his fingers beyond the keyboard, left and right, to the place where the notes would be if the keyboard were longer at either end. He hears the notes in his mind, but it is frustrating that neither he nor anyone else can hear them in the air.