Alright so this is how it is. I was reading the Lion the Witch and the Wardrobe, and there really is a lot in that book to think about. The author, C.S. Lewis became a catholic late in his life and put a lot a lot of things in his book that resemble catholic terms and people and such.

Aslan, the great lion and savior, sacrificed himself for the good that he saw in someone that everyone else overlooked. Aslan was later resurrected. Aslan resembles Narnias Jesus Christ. He is the son of a king or lord or something like that in a distant land. By some distant land its an allegory for heaven.
I think that this story has a lot of themes like the struggle between good and evil and shape shifters and the wise teacher and the darkness and things like that. I think that Edmund would be a shape shifter because C.S. Lewis sort of hints that Edmund has something going on inside him, like a conflict on weather he should join the path of evil, or the path of good. Aslan is a wise lion who teaches the four kids the value of life and how to see the good in people. The White Witch is the darkness that is sort of acting a character who shows greed and evil throughout the book.
There are so many things that come into this book that C.S. Lewis sort of hints and points out that he wants his readers to discover throughout the book, that a lot of people don't think about. When Aslan sacrifices himself, he is doing it because he sees a shinning light in Edmund that no one else can see and is willing to give himself up for him. Everyone is so close minded, that they don't look at people to see who they really are.
In the end, when they all stumble back through the wardrobe, and no time at all has passed in our world, I think that's a great twist because it seems perfectly logical that in a different universe there could be a totally different time zone. And in that universe there are things that people here, now would only take as a joke, like talking animals or magic or things like that.