" When he passed me in the restaurant," he said at last, "I had a curious impression. It was as though a wild animal – an animal savage, but savage! you understand – had passed me by."

"And yet he looked altogether of the most respectable."

"Précisément! The body – the cage – is everything of the most respectable – but through the bars, the wild animal looks out."

"You are fanciful, mon vieux," said M. Bouc.

"It may be so. But I could not rid myself of the impression that evil had passed me by very close." (1.2.52-56) "

― Agatha Christie , Murder on the Orient Express (Hercule Poirot, #9)