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.

Chance is the nature of our universe. [...] madness represents a chaotic reservoir of surprises. Some surprises can be valuable.

The gravest error a thinking person can make is to believe that one particular version of history is absolute fact. History is recorded by a series of observers, none of whom is impartial. The facts are distorted by sheer passage of time and thousands of years of humanity's dark ages, deliberate misrepresentations by religious sects, and the inevitable corruption that comes from an accumulation of careless mistakes. The wise person, then, views history as a set of lessons to be learned, choices and ramifications to be considered and discussed, and mistakes that should never again be made.

Constitutions become the ultimate tyranny," Paul said. "They’re organized power on such a scale as to be overwhelming. The constitution is social power mobilized and it has no conscience. It can crush the highest and the lowest, removing all dignity and individuality. It has an unstable balance point and no limitations.

There's an unwritten compact between you and the reader. If someone enters a bookstore and sets down hard earned money (energy) for your book, you owe that person some entertainment and as much more as you can give.

I'm going to rub your faces in things you try to avoid. I don't find it strange that all you want to believe is only that which comforts you. How else do humans invent the traps which betray us into mediocrity? How else do we define cowardice?

Memory never recaptures reality. Memory reconstructs. All reconstructions change the original, becoming external frames of reference that inevitably fall short.