" Do not laugh! But once upon a time (my crest has long since fallen) I had a mind to make a body of more or less connected legend, ranging from the large and cosmogonic, to the level of romantic fairy-story – the larger founded on the lesser in contact with the earth, the lesser drawing splendour from the vast backcloths – which I could dedicate simply to: to England; to my country. It should possess the tone and quality that I desired, somewhat cool and clear, be redolent of our ‘air’ (the clime and soil of the North West, meaning Britain and the hither parts of Europe: not Italy or the Aegean, still less the East), and, while possessing (if I could achieve it) the fair elusive beauty that some call Celtic (though it is rarely found in genuine ancient Celtic things), it should be ‘high’, purged of the gross, and fit for the more adult mind of a land long now steeped in poetry. I would draw some of the great tales in fullness, and leave many only placed in the scheme, and sketched. The cycles should be linked to a majestic whole, and yet leave scope for other minds and hands, wielding paint and music and drama. Absurd.
Of course, such an overweening purpose did not develop all at once. The mere stories were the thing. They arose in my mind as ‘given’ things, and as they came, separately, so too the links grew. An absorbing, though continually interrupted labour (especially since, even apart from the necessities of life, the mind would wing to the other pole and spend itself on the linguistics): yet always I had the sense of recording what was already ‘there’, somewhere: not of ‘inventing’. Of course, I made up and even wrote lots of other things (especially for my children). Some escaped from the grasp of this branching acquisitive theme, being ultimately and radically unrelated: Leaf by Niggle and Farmer Giles, for instance, the only two that have been printed. The Hobbit, which has much more essential life in it, was quite independently conceived: I did not know as I began it that it belonged. But it proved to be the discovery of the completion of the whole, its mode of descent to earth, and merging into ‘history’. As the high Legends of the beginning are supposed to look at things through Elvish minds, so the middle tale of the Hobbit takes a virtually human point of view – and the last tale blends them. "
― J.R.R. Tolkien , The Letters of J.R.R. Tolkien