Mr. Beaver identifies treason in Edmund:
“Then mark my words,” said Mr. Beaver, “he has already met the White Witch and joined her side, and been told where she lives. I didn’t like to mention it before (he being your brother and all) but the moment I set eyes on that brother of yours I said to myself ‘Treacherous.’ He had the look of one who has been with the witch and eaten her food. You can always tell them if you’ve lived long in Narnia; something about their eyes.”
Solomon elaborates on the eyes of sin when he writes: “Haughty eyes and a proud heart, the lamp of the wicked, are sin.” Edmund fits the prodigal picture quite well in C.S. Lewis. He finds the appeal of the wicked greater than righteousness. Mr. Beaver, on the other hand, has mastered discernment. He sees the wink of deceit.