“There are two kinds of knowledge, local and universal.”

“Belief is the wound that knowledge heals.”

“But need alone is not enough to set power free: there must be knowledge.”

“How rich we are in knowledge, and in all that lies around us yet to learn. Billionaires, all of us.”

“One alien is a curiosity, two are an invasion.”

“He knew now, and the knowledge was hard, that his task had never been to undo what he had done, but to finish what he had begun.”

“As a man's knowledge grows, and his power increases, the road he takes grows ever narrower, until at last he does only and wholly what he must.”