The Book And The Brotherhood - pg. 437

Duncan was well aware that Crimond had in him some sort of steely element, some pure mad self-indifferent recklessness, which Duncan, however strong his emotions, however fierce his hatred, simply lacked. Whatever the game was, Crimond was likely to win it; and Duncan even found himself relying, contemptibly, for the outcome, upon Crimond's rationality, or upon some hypothetical sense of decency which would preclude too brutal a treatment of the hated husband.