“The smoke! The golden smoke! His robe whipped upward, turning him until his face was directed downward into the abyss. With his gaze on the depths, he recognized a maelstrom of boiling rapids there, the mirror of his life-precipitous currents and plunges, all movement gathering up all substance. Leto’s words wound through his mind on a path of golden smoke: “Caution is the path to mediocrity. Gliding, passionless mediocrity is all that most people think they can achieve.” Moneo fell freely then in the ecstasy of awareness. The universe opened for him like clear glass, everything flowing in a no Time.”

“Then, as his planet killed him, it occurred to Kynes that his father and all the other scientists were wrong, that the most persistent principles of the universe were accident and error.”

“The voice of a rebeck echoed from somewhere behind him. The music echoed and echoed until it entered his head, still echoing. It suffused his body and he felt himself to be large, very large, not a child at all. And his skin was not his own.”

“We can say that Muad'Dib learned rapidly because his first training was in how to learn. And the first lesson of all was the basic trust that he could learn.”

“The convoluted wording of legalisms grew up around the necessity to hide from ourselves the violence we intend toward each other. Between depriving a man of one hour from his life and depriving him of his life there exists only a difference of degree. You have done violence to him, consumed his energy.”

“Leto turned a hard stare at Kynes. And Kynes, returning the stare, found himself troubled by a fact he had observed here: This Duke was concerned more over the men than he was over the spice. He risked his own life, and that of his son to save the men. He passed off the loss of a spice crawler with a gesture. The threat to men's lives had him in a rage. A leader such as that would command fanatic loyalty. He would be difficult to defeat.Against his own will and all previous judgements, Kynes admitted to himself: I like this Duke.”

“There was a man who sat each day looking out through a narrow vertical opening where a single board had been removed from a tall wooden fence. Each day a wild ass of the desert passed outside the fence and across the narrow opening—first the nose, then the head, the forelegs, the long brown back, the hindlegs, and lastly the tail. One day, the man leaped to his feet with the light of discovery in his eyes and he shouted for all who could hear him: “It is obvious! The nose causes the tail!”