"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… - Frank Herbert

Polish comes from the cities; wisdom from the desert.

For a moment, the sensation of coolness and the moisture were blessed relief. 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.

She asked me to tell her what it is to rule,” Paul said. “And I said that one commands. And she said I had some unlearning to do.” She hit a mark there right enough, Hawat thought. He nodded for Paul to continue. “She said a ruler must learn to persuade and not to compel. She said he must lay the best coffee hearth to attract the finest men.