“Fear is the mind-killer.”

“Try looking into that place where you dare not look! You'll find me there, staring out at you!”

“There is no escapewe pay for the violence of our ancestors.”

“The man without emotions is the one to fear.”

“Whether a thought is spoken or not it is a real thing and it has power," Tuek said. "You might find the line between life and death among the Fremen to be too sharp and quick.”

“You have a nicety of awareness of the difference between a blade's edge and its tip.”

“While we are actually subjected to them, the 'moods' and 'spirits' of nature point no morals. Overwhelming gaiety, insupportable grandeur, sombre desolation are flung at you. Make what you can of t...”

“...[N]ature generally in the distribution of her capacities has adapted the means to the end... [so nature's] true destination must be to produce a will, not merely good as a means to something els...”

“Morality is simply the attitude we adopt towards people we personally dislike.”

“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.”