A couple of passages from Tolkien on Easter, the first from “On Fairy-Stories”:
I would venture to say that approaching the Christian Story from this direction, it has long been my feeling (a joyous feeling) that God redeemed the corrupt making-creatures, men, in a way fitting to this [story-telling] aspect, as to others, of their strange nature. The Gospels contain a fairystory, or a story of a larger kind which embraces all the essence of fairy-stories. They contain many marvels—peculiarly artistic, beautiful, and moving: ‘mythical’ in their perfect, selfcontained significance; and among the marvels is the greatest and most complete conceivable eucatastrophe. But this story has entered History and the primary world; the desire and aspiration of sub-creation has been raised to the fulfillment of Creation. The Birth of Christ is the eucatastrophe of Man’s history. The Resurrection is the eucatastrophe of the story of the Incarnation. This story begins and ends in joy. It has pre-eminently the ‘inner consistency of reality.’ There is no tale ever told that men would rather find was true, and none which so many sceptical men have accepted as true on its own merits. For the Art of it has the supremely convincing tone of Primary Art, that is, of Creation. To reject it leads either to sadness or to wrath.
And the second from a 1944 letter to his son Christopher (in which he alludes to the above passage from his essay):
the Resurrection was the greatest ‘eucatastrophe’ possible in the greatest Fairy Story – and produces that essential emotion: Christian joy which produces tears because it is qualitatively so like sorrow, because it comes from those places where Joy and Sorrow are at one, reconciled, as selfishness and altruism are lost in Love. Of course I do not mean that the Gospels tell what is only a fairy-story; but I do mean very strongly that they do tell a fairy-story: the greatest. Man the story-teller would have to be redeemed in a manner consonant with his nature: by a moving story. But since the author if it is the supreme Artist and the Author of Reality, this one was also made to Be, to be true on the Primary Plane. So that in the Primary Miracle (the Resurrection) and the lesser Christian miracles too though less, you have not only that sudden glimpse of the truth behind the apparent Anankê [Greek: necessity, constraint] of our world, but a glimpse that is actually a ray of light through the very chinks of the universe about us.