Their whole training has been authoritarian. They are sure that the Emperor, just because he is the Emperor, is all-powerful. And they are sure that … - Isaac Asimov

How then to enforce peace? Not by reason, certainly, nor by education. If a man could not look at the fact of peace and the fact of war and choose the former in preference to the latter, what additional argument could persuade him? What could be more eloquent as a condemnation of war than war itself?

Pero ya lo ve, no se pueden hacer diferencias entre un robot y el mejor de los humanos.

It is possible to be too stable. No Outer World has colonized a new planet in two and a half centuries.. are lives too long to risk and too comfortable to upset.

"I don't know about that, Dr. Fastolfe. You've come to Earth. You risk disease."

"Yes, I do. There are some of us, Mr. Baley, who feel that the future of the human race is even worth the possible loss of an extended lifetime. Too few of us, I am sorry to say."

"In trying to introduce robots here on Earth, we're doing our best to upset the balance of your City economy."

"You mean you're creating a growing group of displaced and declassified men on purpose?"

"Not out of cruelty or callousness, believe me. A group of displaced men, as you call them, are what we need to serve as a nucleus for colonization. Your ancient America was discovered by ships fitted out with men from the prisons. Don't you see that the City's womb has failed the displaced man. He has nothing to lose and worlds to gain by leaving Earth.