"It seems, then," said Tirian, "that the stable seen from within and the stable seen from without are two different places."

"Yes," said the Lord Digory, "Its inside is bigger than its outside."

"Yes," said Queen Lucy, "In our world too, a stable once had Something inside it that was bigger than our whole world."

The Last Battle

"The pain itself made Puddleglum's head for a moment perfectly clear and he knew exactly what he really thought. There is nothing like a good shock of pain for dissolving certain kinds of magic.

He said, 'All you've been saying is quite right, I shouldn't wonder. I'm a chap who always liked to know the worst and then put the best face I can on it. So I won't deny any of what you said. But there's one thing to be said, even so. Suppose we have only dreamed, or made up, all those things - trees, grass, sun, moon and stars and Aslan himself. Then all I can say is, in that case, the made-up things seem a good deal more important than the real ones. Suppose this black pit of a kingdom of yours is the only world. Well, it strikes me as a pretty poor one. And that's a funny thing, when you come to think of it. We're just making up a game, if you're right. But in playing a game we can make a play-world that licks your real world hollow. That's why I'm going to stand by the play-world. I'm on Aslan's side even if there isn't any Aslan to lead it. I'm going to live as like a Narnian as I can, even if there isn't any Narnia. So, thanking you kindly, we're leaving your court at once and setting out in the dark to spend our lives looking for Overland. Not that our lives will be very long, I should think; but that's small loss if the world's as dull a place as you say.'"

Puddleglum to the Green Witch of Underland in The Silver Chair