What are we to make of the Resurrection?

I heard a man say, “The importance of the Resurrection is that it gives evidence of survival, evidence that the human personality survives death.” On that view what happened to Christ would be what had always happened to all men, the difference being that in Christ’s ease we were privileged to see it happening. This is certainly not what the earliest Christian writers thought. Something perfectly new in the history of the Universe had happened. Christ had defeated death. The door which had always been locked had for the very first time been forced open. This is something quite distinct from mere ghost-survival. I don’t mean that they disbelieved in ghost-survival. On the contrary, they believed in it so firmly that, on more than one occasion, Christ had had to assure them that He was not a ghost. The point is that while believing in survival they yet regarded the Resurrection as something totally different and new. The Resurrection narratives are not a picture of survival after death; they record how a totally new mode of being has arisen in the universe. Something new had appeared in the universe: as new as the first coming of organic life. This Man, after death, does not get divided into “ghost” and “corpse”. A new mode of being has arisen. That is the story. What are we going to make of it? 
The question is, I suppose, whether any hypothesis covers the facts so well as the Christian hypothesis. That hypothesis is that God has come down into the created universe, down to manhood—and come up again, pulling it up with Him. The alternative hypothesis is not legend, nor exaggeration, nor the apparitions of a ghost. It is either lunacy or lies. Unless one can take the second alternative (and I can’t) one turns to the Christian theory.
C.S. Lewis, "What Are We to Make of Jesus Christ?" (1950)