“For my present purpose I require a word which shall embrace both the Sub- creative Art in itself and a quality of strangeness and wonder in the Expression, derived from the Image: a quality essential to fairy-story…”
“…of freedom from the domination of observed “fact,” in short of the fantastic. I am thus not only aware but glad of the etymological and semantic connexions of fantasy with fantastic: with images of things that are not only “not actually present,” but which are indeed not to be found in our primary world at all, or are generally believed not to be found there.”
“That the images are of things not in the primary world (if that indeed is possible) is a virtue, not a vice. Fantasy (in this sense) is, I think, not a lower but a higher form of Art, indeed the most nearly pure form, and so (when achieved) the most potent.”
Creative fantasy, because it is mainly trying to do something else (make something new), may open your hoard and let all the locked things fly away like cage-birds.”
https://www.brainpickings.org/2013/12/05/j-r-r-tolkien-on-fairy-stories/