A short life is better for mankind, for a long life would deprive man of his optimism.

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.

Socialism is good when it comes to wages, but it tells me nothing when it comes to other questions in life that are more private and painful, for which I must seek answers elsewhere.

Great God of the Ants, thou hast granted victory to thy servants. I appoint thee honorary Colonel.

Among human beings, a cat is merely a cat; among cats, a cat is a prowling shadow in a jungle.

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.

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.