Do not forget that a traitor within our ranks, known to us, can do more harm to the enemy than a loyal man can do good to us.
I don't believe in personal immortality; the only way I expect to have some version of such a thing is through my books.
There is no one so insufferable as a person who gives no other excuse for a peculiar action than saying he had been directed to it in a dream.
He had read much, if one considers his long life; but his contemplation was much more than his reading. He was wont to say that if he had read as much as other men he should have known no more than other men.
The true artist is quite rational as well as imaginative and knows what he is doing; if he does not, his art suffers.
Custom is second nature. Be accustomed to a bald head, sufficiently accustomed, and hair on it would seem monstrous.
A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.
A neat and orderly laboratory is unlikely. It is, after all, so much a place of false starts and multiple attempts.
Every human being lived behind an impenetrable wall of choking mist within which no other but he existed. Occasionally there were the dim signals from deep within the cavern in which another man was located so that each might grope toward the other. Yet because they did not know one another, and could not understand one another, and dared not trust one another, and felt from infancy the terrors and insecurity of that ultimate isolation there was the hunted fear of man for man, the savage rapacity of man toward man.
I even got a letter from a young woman in British Columbia that began as follows: 'Today I am eighteen. I am sitting at the window, looking out at the rain, and thinking how much I love you.'
I'm gradually managing to cram my mind more and more full of things. I've got this beautiful mind and it's going to die, and it'll all be gone. And then I say, not in my case. Every idea I've ever had I've written down, and it's all there on paper. And I won't be gone; it'll be there.
During the century after Newton, it was still possible for a man of unusual attainments to master all fields of scientific knowledge. But by 1800, this had become entirely impracticable.
The significant chemicals of living tissue are rickety and unstable, which is exactly what is needed for life.
It’s a poor atom blaster that won’t point both ways.
One might accept death reasoningly, with every aspect of the conscious mind, but the body was a brute beast that knew nothing of reason.
If all human beings understood history, they might cease making the same stupid mistakes over and over.
I, on the other hand, am a finished product. I absorb electrical energy directly and utilize it with an almost one hundred percent efficiency. I am composed of strong metal, am continuously conscious, and can stand extremes of environment easily. These are facts which, with the self-evident proposition that no being can create another being superior to itself, smashes your silly hypothesis to nothing.
The world is being Americanized and technologized to its limits, and that makes it dull for some people. Reaching the Moon restores the frontier and gives us the lands beyond.
One of Walt Whitman's best-known poems is this one: When I heard the learn'd astronomer,.... The trouble is, Whitman is talking through his hat, but the poor soul didn't know any better
No one can possibly have lived through the Great Depression without being scarred by it. No amount of experience since the depression can convince someone who has lived through it that the world is safe economically.
It's just science fiction so it's allowed to be silly, and childish, and stupid. It's just science fiction, so it doesn't have to make sense. It's just science fiction, so you must ask nothing more of it than loud noises and flashing lights.
Naturally, there's got to be a limit for I don't expect to live forever, but I do intend to hang on as long as possible.
The facts, gentlemen, and nothing but the facts, for careful eyes are narrowly watching.
There was this superstitious fear on the part of the pygmies of the present for the relics of the giants of the past.
It is remarkable, Hardin, how the religion of science has grabbed hold.
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