"<p>You can only play the sheet music you brought with you. You can vary a lot. You can screw it up. You can play it wrong. You can play nicely. You can impromptu. You can change voices in it; you can also cut your violin so that it breaks into pieces, (...) - but you cannot deviate significantly from your Great Score. You can spoil your life, and you can also make it beautiful: whether you play it ugly, beautiful, or even wonderful: YOUR SONG IS SONG!</p>"