" I can admire the perfect murderer--I can also admire a tiger-- that splendid tawny-striped beast. But I will admire him from outside his cage. I will not go inside.
That is to say, not unless it is my duty to do so. For you see, Mr. Shaitana, the tiger might spring. . . . "

― Agatha Christie , Cards on the Table (Hercule Poirot, #14)