Law of the Minimum: "The worst potential competition for any organism can come from its own kind. The species consumes necessities. Growth is limited by that necessity which is present in the least amount. The least favourable condition controls the rate of growth."

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.

There is not secret to balance. You just have to feel the waves.

A man's flesh is his own; the water belongs to the tribe.

Arrakis teaches the attitude of the knife - chopping off what's incomplete and saying: "Now it's complete because it's ended here."

Give me a lamp so I can find the day.

You see, gentlemen, they have something to die for. They've discovered they're a people. They're awakening.