Time doesn't exist for God. He sees all points of time at once. Lewis does mention this toward the end of The Great Divorce in relation to (fear and trembling, I am approaching a controversial subject) Predestination. There is a considerable discussion of time in that section of the book, but it's pretty deep and philosophical. Will go back and study it before commenting further.
I think, however, that realization of Time's non-existence to God is important if we believe in Christianity at all (which I do at times and at others time do not).
