From The Voyage of the Dawn Treader

"Please, Aslan," said Lucy. "Before we go, will you tell us when we can come back to Narnia again? Please. And oh, do, do, do make it soon."
"Dearest," said Aslan very gently, "you and your brother will never come back to Narnia."
"Oh, Aslan!!" said Edmund and Lucy both together in despairing voices.
"You are too old, children," said Aslan, "and you must begin to come close to your own world now."
"It isn't Narnia, you know," sobbed Lucy. "It's you. We shan't meet you there. And how can we live, never meeting you?"
"But you shall meet me, dear one," said Aslan.
"Are-are you there too, Sir?" said Edmund
"I am," said Aslan. "But there I have another name. You must learn to know me by that name. This was the very reason why you were brought to Narnia, that by knowing me here for a little, you may know me better there."

If only, if only we could have that kind of child-like love for Jesus! What a joy life would be. Have we become too encumbered by the things of the world?
Do we remember how our childhood was like? Unburdened, unquestioning, trusting wholly in the love of our parents. Fascinated by the simple joys of life. Oh how we have changed!

"But Jesus called them unto him, and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God."
Luke 18:16