“If two men on the same job agree all the time, then one is useless. If they disagree all the time, both are useless.”

“Silence is the invisibility of talking. I'd take half an argument over half a silence any day. And I'd take peace and quiet over a full-blown argument any other day, unless it's Tuesday.”

“You dont know anything about me.No, I know not everything about you. But I sense enough to know you have mistaken obsession with drive, guilt with injustice. I know you want to escape what you are,...”

“If you've got the truth you can demonstrate it. Talking doesn't prove it.”

“In all debates, let truth be thy aim, not victory, or an unjust interest.”

“Get what you can with words, because words are free, but the words of an armed man ring that much sweeter.”

“The truth." Dumbledore sighed. "It is a beautiful and terrible thing, and should therefore be treated with great caution.”

“The truth is rarely pure and never simple.”

“Never tell the truth to people who are not worthy of it.”