The Lion, the Witch, and the Wardrobe
How we cite our quotes:
"Tell you?" said the Witch, her voice growing suddenly shriller. "Tell you what is written on that very Table of Stone which stands beside us? Tell you what is written in letters deep as a spear is long on the trunk of the World Ash Tree? Tell you what is engraved on the sceptre of the Emperor-Beyond-the-Sea? You at least know the magic which the Emperor put into Narnia at the very beginning. You know that every traitor belongs to me as my lawful prey and that for every treachery I have a right to a kill." (13.41)
Narnia isn't all beautiful landscapes and feel-good romps with Aslan. There are painful requirements in the spiritual laws of this world, and the country itself could be destroyed if Aslan didn't abide by those rules.
"Oh, Aslan!" whispered Susan in the Lion's ear, "can't we – I mean, you won't, will you? Can't we do something about the Deep Magic? Isn't there something you can work against it?"
"Work against the Emperor's magic?" said Aslan turning to her with something like a frown on his face. And nobody ever made that suggestion to him again. (13.48-49)
Susan still doesn't get it – the real point is not just to win and free Edmund and go home, but to do what's right. Aslan will do anything possible to help Edmund, except for undermining the spiritual foundation of the world. That would be too much to ask. Sorry, Susan.
"Oh how can they?" said Lucy, tears streaming down her cheeks. "The brutes, the brutes!" for now that the first shock was over the shorn face of Aslan looked to her braver, and more beautiful, and more patient than ever. (14.48)
Aslan's greatest beauty and power comes through in his moments of suffering and trial. His spirit transcends the humiliations he suffers.