Mark Lawrence said this quote

Genuine surprise is a great help when faced with an unwelcome duty. Of course, when it’s the paying of debts you’re forgetting, that can lead to broken fingers. And worse. I guess it’s a form of lying— lying to oneself. And I’m very good at falsehoods. They often say the best liars half-believe their lies— which makes me the very best because if I repeat a lie often enough I can end up believing it entirely, no half measures involved!