Most among [the Letherii] see no moral flaw in their past deeds. Those who do are unable or unwilling to question their methods, only execution, and so they are doomed to repeat the horrors, and see the result – no matter its nature – as yet one more test of firmly held principles. And even should the blood run in a river around them, they will obsess over the details. One cannot challenge the fundamental beliefs of such people, for they will not listen.

— Midnight tides : a tale of the Malazan book of the fallen by Steven Erikson (Page 212 - 213)