If dogs could talk, perhaps we would find it as hard to get along with them as we do with people.

Robots of the world, you are ordered to exterminate the human race. Do not spare the men. Do not spare the women. Preserve only the factories, railroads, machines, mines, and raw materials. Destroy everything else. Then return to work. Work must not cease.

Robots do not hold on to life. They can't. They have nothing to hold on with - no soul, no instinct. Grass has more will to live than they do.

I certainly don't know if you could claim that every theft is wrong, but I'll prove to you that every theft is forbidden, by simply locking you up.

Relativism is neither a method of fighting, nor a method of creating, for both of these are uncompromising and at times even ruthless; rather, it is a method of cognition.

You can have a revolution wherever you like, except in a government office; even were the world to come to an end, you'd have to destroy the universe first and then government offices.

My dear Miss Glory, Robots are not people. They are mechanically more perfect than we are, they have an astounding intellectual capacity, but they have no soul.