A stone is heavy and the sand is weighty; but a fool's wrath... - Frank Herbert, Dune

"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."

"Scientists seek the lawfulness of events. It is the task of Religion to fit man into this lawfulness."

"Religion must remain an outlet for people who say to themselves, 'I am not the kind of person I want to be.' It must never sink into an assemblage of the self-satisfied."

"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."

"There is no escape—we pay for the violence of our ancestors."