Think what that descent is. The coming down, not only into humanity, but into those nine months which precede human birth, in which they tell us we all recapitulate strange pre-human, sub-human forms of life, and going lower still into being a corpse, a thing which, if this ascending movement had not begun, would presently have passed out of the organic altogether, and have gone back into the inorganic, as all corpses do.
One has a picture of someone going right down and dredging the sea-bottom. One has a picture of a strong man trying to life a very big, complicated burden. He stoops down and gets himself right under it so that he himself disappears; and then he straightens his back and moves off with the whole thing swaying on his shoulders. Or else one has the picture of a diver, stripping off garment after garment, making himself naked, then flashing for a moment in the air, and then down through the green, and warm, and sunlit water into the pitch black, cold, freezing water, down into the mud and slime, then up again, his lungs almost bursting, back again to the green and warm and sunlit water, and then at last out into the sunshine, holding in his hand the dripping thing he went down to get. This thing is human nature; but, associated with it, all nature, the new universe...
A man really ought to say, 'The Resurrection happened two thousand years ago' in the same spirit in which he says, 'I saw a crocus yesterday.' Because we know what is coming behind the crocus. The spring comes slowly down this way; but the great thing is that the corner has been turned.
-C. S. Lewis