[Eustace] had turned into a dragon while he was asleep. Sleeping on a dragon’s hoard with greedy, dragonish thoughts in his heart, he had become a dragon himself…. As for the pain in his left arm (or what had been his left arm) he could now see what had happened by squinting with his left eye. The bracelet which had fitted very nicely on the upper arm of a boy was far too small for the thick, stumpy foreleg of a dragon. It had sunk deeply into his scaly flesh and there was a throbbing bulge on each side of’ it. He tore at the place with his dragon’s teeth but could not get it off.
In spite of the pain, his first feeling was one of relief. There was nothing to be afraid of any more. He was a terror himself now and nothing in the world but a knight (and not all of those) would dare to attack him. He could get even with Caspian and Edmund now—
But the moment he thought this he realized that he didn’t want to. He wanted to be friends. He wanted to get back among humans and talk and laugh and share things. He realized that he was a monster cut off from the whole human race. An appalling loneliness came over him. He began to see that the others had not really been fiends at all. He began to wonder if he himself had been such a nice person as he had always supposed. He longed for their voices. He would have been grateful for a kind word even from Reepicheep.
When he thought of this the poor dragon that had been Eustace lifted up its voice and wept. A powerful dragon crying its eyes out under the moon in a deserted valley is a sight and a sound hardly to be imagined.
C.S. Lewis, The Voyage of the Dawn Treader (1952; this edition: HarperCollins, 1994) 91-92.