Read this passage from C. S. Lewis’, ‘The Silver Chair’

The Witch is persuading the children that their world above ground is make-believe:

“Put away these childish tricks… there is no Narnia, no Overworld, no sky, no Sun, no Aslan.”
The Prince and the two children were standing with their heads hung down…. the strength all gone from them. But Puddleglum, desperately gathering all his strength, walked over to the fire. With his bare foot he stamped on the fire, grinding a large part of it into ashes on the flat hearth…The pain made Puddleglum’s head for a moment perfectly clear and he knew exactly what he really thought. “One word, Madam,” he said, coming back from the fire, limping because of the pain. “One word… supposing we have only dreamed, or made up, all those things - trees and grass and sun and moon and Aslan himself. Then all I can say is that, 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 babies making up a game, if you’re right. But four babies playing a game can make a play-world which 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.”