A robot may not injure a human being, or, through inaction, allow a human being to come to harm.

I don't believe in an afterlife, so I don't have to spend my whole life fearing hell, or fearing heaven even more. For whatever the tortures of hell, I think the boredom of heaven would be even worse.

Someone once asked me, "If you had your choice, Dr. Asimov, would it be women or writing?" My answer was, "Well, I can write for twelve hours at a time without getting tired."

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.

All mankind, right down to those you most despise, are your neighbors.

Writing is an addiction more powerful than alcohol, than nicotine, than crack. I could not conceive of not writing.

Radiation, unlike smoking, drinking, and overeating, gives no pleasure, so the possible victims object.

Books ... hold within them the gathered wisdom of humanity, the collected knowledge of the world's thinkers, the amusement and excitement built up by the imaginations of brilliant people. Books contain humor, beauty, wit, emotion, thought, and, indeed, all of life. Life without books is empty.

The foundation of all technology is fire.

If anyone can be considered the greatest writer who ever lived, it is Shakespeare.