Lewis the Thomist?

I happened upon the following line in CS Lewis's chapter on the Incarnation:

"Nature by dominating spirit wrecks all spiritual activities: spirit by dominating Nature confirms and improves natural activities." ("The Grand Miracle," Miracles)

This strikes me as Lewis's version of grace-perfecting-nature. A professor friend thinks Lewis's opinion of nature and grace reflects Henri De Lubac:

"When He said, ‘Be perfect,’ He meant it. He meant that we must go in for the full treatment. It is hard; but the sort of compromise we are all hankering after is harder—in fact, it is impossible. It may be hard for an egg to turn into a bird: it would be a jolly sight harder for it to learn to fly while remaining an egg. We are like eggs at present. And you cannot go on indefinitely being just an ordinary, decent egg. We must be hatched or go bad." ("Is Christianity Hard or Easy?" Mere Christianity)

De Lubac's 's controversial position was that there were no natural ends (or, goal, purpose, from the Greek term telos); the human person has super-natural ends. According to Lewis's egg image, the egg is meant to hatch as a chick; this is the end of an egg, parallel to the supernatural end of the human person. A person cannot go on as a merely natural person; either one is born again as a Spirit creature, or one goes bad. Lewis presents this in his fine dream story, The Great Divorce.