Studies [on the origin of fairy-stories] are, however,....

“ Studies [on the origin of fairy-stories] are, however, scientific (at least in intent); they are the pursuit of folklorists or anthropologists: that is of people using the stories not as they were meant to be used, but as a quarry from which to dig evidence, or information, about matters in which they are interested....with regard to fairy stories, I feel that it is more interesting, and also in its way more difficult, to consider what they are, what they have become for us, and what values the long alchemic processes of time have produced in them. In Dasent's words I would say: 'We must be satisfied with the soup that is set before us, and not desire to see the bones of the ox out of which it has been boiled.'Such stories have now a mythical or total (unanalysable) effect, an effect quite independent of the findings of Comparative Folk-lore, and one which it cannot spoil or explain; they open a door on Other Time, and if we pass through, though only for a moment, we stand outside our own time, outside Time itself, maybe. ”

J.R.R. Tolkien

From : Tolkien on Fairy-stories