“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.”

“The Fremen have a simple, practical religion,” he said.“Nothing about religion is simple.”

“Universe is nothing, but human thought.”

“Nothing is the whole story. The selfs curse and the writers.”

“There's a fine line, you know. Between having space and having nothing.”

“Science is a river with two sources, the practical source and the theoretical source.”

“If we had always thought from a so-called practical angle we wouldve never had anything new in this world. We wouldve hidden under the security of practicality and taken no risk, we would have nev...”

“Rounding to the nearest cent is sufficiently accurate for practical purposes.”