The idea that Christ is the corn king - the fulfillment of the myths that thread through history - rings loud and often in Lewis's work. In Miracles Lewis presents the Incarnation as the greatest of all the signs of God.
What is meant by God becoming human? "In what sense is it conceivable that eternal self-existent Spirit... should be so combined with a natural human organism as to make one person?" asks Lewis. It is conceivable because we see in God's descent, our own.
Lewis famously said that none of us have met mere mortals (see Weight of Glory) because, whether we are dying to heaven's reward or falling for hell's charms, all of us will live eternally. And this eternal sense of being is formed inside our throw-away human structure that is our body. Lewis says it this way -
"We can understand that if God so descends into human spirit, and human spirit so descends into Nature, and our thoughts into our senses of passions, and if adult minds can descend into sympathy with children, and men into sympathy with beasts, then everything hangs together and the total reality, both Natural and Supernatural, in which we are living is more multifariously and subtly harmonious than we had suspected."