“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.”

“Seek freedom and become captive of your desires. Seek discipline and find your liberty.”

“One of the best things to come out of the home computer revolution could be the general and widespread understanding of how severely limited logic really is.”

“Without change, something sleeps inside us, and seldom awakens. The sleeper must awaken.”

“If you think of yourselves as helpless and ineffectual, it is certain that you will create a despotic government to be your master. The wise despot, therefore, maintains among his subjects a popular sense that they are helpless and ineffectual.”

“Truth suffers from too much analysis.”

“I must not fear. Fear is the mind-killer. Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past, I will turn the inner eye to see its path. Where the fear has gone, there will be nothing. Only I will remain.”

“The beginning of knowledge is the discovery of something we do not understand.”

“Respect for the truth comes close to being the basis for all morality.”

“It could be a work of art among vendettas”

“There will be sadness," Alia intoned. "I remind you that all things are but beginning, forever beginning. Worlds wait to be conquered. Some within the sound of my voice will attain exalted destinies. You will sneer at the past, forgetting what I tell you now: within all differences there is unity.”