Truth is a weapon and lies are a necessary shield.

I'm a good liar. A great one. And to be a great liar you have to live your lies, to believe them, to the point that when you tell them to yourself enough times, even what's right before your eyes will bend itself to the falsehood.

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!

Words are steps along a path: the important thing is to get where you're going. You can play by all manner of rules, ... but you'll get there quicker if you pick the most certain route. Lies are complex things. Best not to bother thinking in terms of truth or lie-let necessity be your mother ... and invent!