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

“My father once told me that respect for truth comes close to being the basis for all morality. 'Something cannot emerge from nothing,' he said. This is profound thinking if you understand how unstable 'the truth' can be.”

“A sophisticated human can become primitive. What this really means is that the human's way of life changes. Old values change, become linked to the landscape with it's plants and animals. This new existence requires a working knowledge of those multiplex and cross-linked events usually referred to as Nature. It requires a measure of respect for the inertial power within such natural systems. When a human gains this knowledge and respect, that is called "being primitive". The converse, of course, is equally true: the primitive human can become sophisticated, but not without incurring dreadful psychological damage.”

“All of history is a malleable instrument in my hands. Ohhh, I have accumulated all of these pasts and I possess every fact—yet the facts are mine to use as I will and, even using them truthfully, I change them.”

“Many have marked the speed with which Muad'Dib learned the necessities of Arrakis. The Bene Gesserit, of course, know the basis of this speed. For the others, 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. It is shocking to find how many people do not believe they can learn, and how many more believe learning to be difficult. Muad'Dib knew that every experience carries its lesson.”

“Beware of the truth, gentle Sister. Although much sought after, truth can be dangerous to the seeker. Myths and reassuring lies are much easier to find and believe. If you find a truth, even a temporary one, it can demand that you make painful changes. Conceal your truths within words. Natural ambiguity will protect you then.”

“I should like friendship with you ... and trust. I should like that respect for each other which grows in the breast without demand for the huddlings of sex.”