Susan Pevensie: Lucy thinks she's found a magical land...
Professor Kirke: Hmmm.
Susan Pevensie: In the upstairs wardrobe.
Professor Kirke: What? What did you say?
Peter Pevensie: Our sister... She thinks she's found a wood...
Professor Kirke: What was it like?
Susan Pevensie: Like talking to a lunatic...
Professor Kirke: No, no, not her, the wood!
Susan Pevensie: You don't mean you believe her?
Professor Kirke: And you don't?
Susan Pevensie: He's a beaver! He shouldn't be saying anything!
Aslan: If the Witch understood the true meaning of sacrifice, she would have interpreted the deep magic differently. That when a willing victim who has committed no wrong, offers himself in a traitor's stead, the stone table will crack, and death itself will go backwards.
Professor Kirke: What were you all doing in the wardrobe?
Peter Pevensie: You wouldn't believe us if we told you, sir.
Professor Kirke: Try me.
Susan Pevensie: It's our sister, Lucy.
Professor Kirke: The weeping girl.
Susan Pevensie: Yes, sir. She's upset.
Professor Kirke: Hence the weeping.
Peter Pevensie: It's nothing. We can handle it.
Professor Kirke: Oh, I can see that.
Lucy Pevensie: [Holds out her hand.] Pleased to meet you Mr. Tumnus, I'm Lucy Pevensie.
[Mr. Tumnus looks at her hand curiously.]
Lucy Pevensie: Oh, you shake it.
Mr. Tumnus: Why?
Lucy Pevensie: I... I don't know.
Susan Pevensie: Besides, we could all use the fresh air.
Edmund Pevensie: It's not like there isn't air inside.
The Fox: I'm sorry, Your Majesty.
White Witch: Don't waste my time with flattery.
The Fox: [Looking at Edmund.] Not to be rude, ma'am, but I wasn't talking to you.
Mrs. Beaver: You'll thank me later, its a long journey, and Beaver gets cranky when he's hungry.
Mr. Beaver: I'm cranky now!
Lucy Pevensie: It's all right! I'm back, I'm all right!
Edmund Pevensie: Shh, he's coming!
Peter Pevensie: I don't think you two have quite got the idea of this game.
Lucy Pevensie: But weren't you wondering where I was?
Edmund Pevensie: That's the point. That's why he was seeking you!
Susan Pevensie: [Coming out of her hiding place.] Does this mean I win?
Peter Pevensie: I don't think Lucy wants to play anymore.
Lucy Pevensie: But...I've been gone for hours.
Jadis: Tell me, Edmund, are your sisters deaf?
Edmund Pevensie: No...
Jadis: And your brother, is he...unintelligent?
Edmund: Well...I think so. But Mother says...
Jadis: Then HOW DARE YOU COME ALONE!
Maugrim: Please don't try to run. We're tired and we'd prefer to kill you quickly.
[Bird lands on branch outside doorway.]
Bird: Psssst...
Susan Pevensie: Did that bird just psssst at us?
[Mrs. Beaver strokes her fur, embarrassed.]
Mrs. Beaver: Couldn't have given me five minutes warning?
Mr. Beaver: I would've given you a WEEK if I thought it'd help!
[The horse Edmund rides rears up.]
Edmund Pevensie: Whoa, Horsey! Whoa!
Horse: My name is Philip.
Griffin: They come in numbers far greater than our own.
General Otmin: Numbers do not win a battle.
Peter Pevensie: No, but I bet they help.
Answer: Spoiler alert: this gives some important plot twists away. Sometimes a bit of unresolved mystery improves a story, and I think this is the case here. But the book partly answers your questions. At the end of the last chapter it is shown that Mrs MacReady thinks the wardrobe is just a piece of furniture. She knows nothing about Narnia. But Professor Kirke amazes Peter, Edmund, Susan and Lucy by expressing familiarity with Narnia and explaining that a wardrobe might well be a portal into Narnia. If C S Lewis had not written any more books after completing "The Lion The Witch And The Wardrobe" Professor Kirke's knowledge of Narnia would probably have been an unresolved mystery. But C S Lewis later wrote "The Magician's Nephew" which tells how Professor Kirke visited Narnia as a boy. The final chapter of this book says he took an apple back with him, which he planted in his garden. It grew into a tree, was cut down and made into the wardrobe. So Professor Kirke was not consciously aware of what the wardrobe could do, but with hindsight, he realised that he had set up a chain of events that caused the children to discover Narnia.