Were I asked, what is a fairytale? I should reply, Read Undine: that is a fairytale; then read this and that as well, and you will see what is a fairytale. Were I further begged to describe the fairytale, or define what it is, I would make answer, that I should as soon think of describing the abstract human face, or stating what must go to constitute a human being. A fairytale is just a fairytale, as a face is just a face; and of all fairytales I know, I think Undine the most beautiful.

The Fantastic Imagination (1893)