“My argument is this. I know that I have not created Bach’s music, or Mozart’s; that I have not created Rembrandt’s pictures, or Botticelli’s. I am quite certain that I never could do anything like it … I know that I do not have the imagination to write anything like the Iliad or the Inferno or The Tempest… I know that I am incapable of creating, out of my own imagination, anything as beautiful as the mountains and glaciers of Switzerland, or even as some of the flowers and trees in my own garden. I know that ours is a world I never made”.