A great way to win a population is to change the definitions of words that they believe they know just as the ape did in The Last Battle. As he is trying to convince all the creatures of Narnia that this entire Calormene invasion is done with the blessing of Aslan, he tries to make a modification to the belief system of the Narnians.
“But the others, listen. Tash is only another name for Aslan. All that old idea of us being right and the Calormenes wrong is silly. We know better now. The Calormenes use different words but we all mean the same thing. Tash and Aslan are only two different names for you know Who. That’s why there can never be any quarrel between them. Get that into your heads, you stupid brutes. Tash is Aslan: Aslan is Tash.”
How often do we do this in the world today? It is just ridiculous to believe in any type of religious exclusivity because we are all climbing up different sides of the same mountain. There is no way that Christians or Muslims for example can claim to have truth on their side because we know better now. In fact, we know that even contradictory teachings about God don’t matter. Of course they are all simultaneously true.
It sounds crazy when we read it in this story because we have met Aslan. We know that he is a lion, and we know that he is what he is. He is not some type of amorphous being who is molded to the whims of different people groups. In fact, he is not changed by anyone. He is himself, and that is a morally perfect, sacrificially loving Creator who is responsible for everything that is good about Narnia. It is ridiculous to think of him simultaneously as the violent and mean-spirited Tash.
How much more crazy should it sound when we have met Jesus Christ here in our own world? Most of us have not physically seen Jesus, but we do know a lot about Him. We know that He was fully man and fully God. We know that He came to earth and lived a sinless life before dying on the cross as a substitute for you and me. He died the death we should have died so that we can have eternal life. Beyond that, we know that He rose from the dead and now is seated at the right hand of God.
He is unique in history just like Aslan is unique. It simply is not responsible to claim that Jesus is the same as Allah for instance. One must be right and the other must be wrong. They make contradictory claims even related to such basic things as Jesus’ divinity. When the world around us tries to define Jesus as just another path to God, we need to be quick to remind them that if Jesus is a path to God, He must be the only one; Christianity does not have room for this type of negotiability.
 CS Lewis, “The Last Battle” in The Chronicles of Narnia Complete 7-Book Collection with Bonus Book: Boxen (New York: HarperCollins, 2005), Kindle Locations 14530-14533, Kindle Edition.