When one plays for top prizes one must be prepared to pay top stakes.

Science fiction may be defined as that branch of literature which deals with the response of human beings to advances in science and technology. Actual change in science and technology, occurring quickly enough and striking deeply enough to affect a human being in the course of his normal lifetime, is a phenomenon peculiar to the world only since the Industrial Revolution ... The first well-known writer who responded to this new factor in human affairs by dealing regularly with science fiction, by studying the effect of additional scientific advance upon mankind ... was Jules Verne. In the English language, the early master was H. G. Wells. Between them, they laid the foundation for every theme upon which science fiction writers have been ringing variations ever since.

Hypocrisy is a universal phenomenon. It ends with death, but not before.

Science is a systematic method for studying and working out those generalizations that seem to describe the behavior of the universe. It could exist as a purely intellectual game that would never affect the practical life of human beings either for good or evil, and that was very nearly the case in ancient Greece, for instance. Technology is the application of scientific findings to the tools of everyday life, and that application can be wise or unwise, useful or harmful. Very often, those who govern technological decisions are not scientists and know little about science.

I simply don't think it is reasonable to use IQ tests to produce results of questionable value, which may then serve to justify racists in their own minds and to help bring about the kinds of tragedies we have already witnessed earlier in this century.

In memory yet green, in joy still felt, The scenes of life rise sharply into view. We triumph; Life's disasters are undealt, And while all else is old, the world is new.

I wouldn't give an astrologer the time of day.

It is surely better to be wronged than to do wrong.

The purpose of aphorisms is to keep fools who have memorised them from having nothing to say.

There is less trouble and trauma involved in writing a new piece than in trying to salvage an unsatisfactory old one.

The undramatic fact is that I just think and think and think until I have something [for a story], and there is nothing marvelous or artistic about the phenomenon.

Certain success evicts one from the paradise of winning against the odds.

The military mind remains unparalleled as a vehicle of creative stupidity.

It is very likely that there are many, many planets carrying life, even intelligent life, throughout the universe, because there are so many stars. By sheer chance, even if those chances are small, a great many life forms and a great many intelligences may exist.

There is a cult of ignorance in the United States, and there always has been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."

I believe that every human being with a physically normal brain can learn a great deal and can be surprisingly intellectual. I believe that what we badly need is social approval of learning and social rewards for learning.We can all be members of the intellectual elite and then, and only then, will a phrase like "America's right to know" and, indeed, any true concept of democracy, have any meaning.

Creationists make it sound as though a "theory" is something you dreamt up after being drunk all night.

It is my own experience ... that commentators are far more ingenious at finding meaning than authors are at inserting it.

Weisinger, a couple of years ago, made up the following story: "Isaac Asimov was asked how Superman could fly faster than the speed of light, which was supposed to be an absolute limit. To this Asimov replied, 'That the speed of light is a limit is a theory; that Superman can travel faster than light is a fact.'"

When you write a short story ... you had better know the ending first. The end of a story is only the end to the reader. To the writer, it's the beginning. If you don't know exactly where you're going every minute you're writing, you'll never get there or anywhere.

Necessity makes a joke of civilization.

Where any answer is possible, all answers are meaningless.

It is change, continuing change, inevitable change, that is the dominant factor in society today. No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be ... This, in turn, means that our statesmen, our businessmen, our everyman must take on a science fictional way of thinking.

What I will be remembered for are the Foundation Trilogy and the Three Laws of Robotics. What I want to be remembered for is no one book, or no dozen books. Any single thing I have written can be paralleled or even surpassed by something someone else has done. However, my total corpus for quantity, quality and variety can be duplicated by no one else. That is what I want to be remembered for.

The true discovery of America by mankind came when those first hunting bands crossed over from Siberia 25,000 years ago. This, however, never seems to count. When people speak of the "discovery of America" they invariably mean its discovery by Europeans.

There is no belief, however foolish, that will not gather its faithful adherents who will defend it to the death.

If, as I maintain and firmly believe, there is no objective definition of intelligence, and what we call intelligence is only a creation of cultural fashion and subjective prejudice, what the devil is it we test when we make use of an intelligence test?

My parents, both of whom spoke Russian fluently, made no effort to teach me Russian, but insisted on my learning English as rapidly and as well as possible. They even set about learning English themselves, with reasonable, but limited, success.In a way, I am sorry. It would have been good to know the language of Pushkin, Tolstoy, and Dostoevski. On the other hand, I would not have been willing to let anything get in the way of the complete mastery of English. Allow me my prejudice: surely there is no language more majestic than that of Shakespeare, Milton, and the King James Bible, and if I am to have one language that I know as only a native can know it, I consider myself unbelievably fortunate that it is English.

Science fiction writers foresee the inevitable, and although problems and catastrophes may be inevitable, solutions are not.

Self-education is, I firmly believe, the only kind of education there is.

Straightforward preaching spoils the effectiveness of a story. If you can't resist the impulse to improve your fellow human beings, do it subtly.

There is no way of being almost funny or mildly funny or fairly funny or tolerably funny. You are either funny or not funny and there is nothing in between. And usually it is the writer who thinks he is funny and the reader who thinks he isn't.

Scientific writing is abhorrently stylized and places a premium on poor quality.

If you're going to write a story, avoid contemporary references. They date a story and they have no staying power.

Generals are, as a matter of course, allowed to be far more idiotic than ordinary human beings are permitted to be.

People are entirely too disbelieving of coincidence. They are far too ready to dismiss it and to build arcane structures of extremely rickety substance in order to avoid it. I, on the other hand, see coincidence everywhere as an inevitable consequence of the laws of probability, according to which having no unusual coincidence is far more unusual than any coincidence could possibly be.

The history of science is full of revolutionary advances that required small insights that anyone might have had, but that, in fact, only one person did.

What, then, of human activities? Is humankind itself hastening its own end? Man has, for instance, been burning carbon-containing fuel — wood, coal, oil, gas — at a steadily accelerating rate. All these fuels form carbon dioxide. Some is absorbed by plants and the oceans but not as fast as it is produced. This means the carbon dioxide content of the air is going up — slightly but nevertheless up. Carbon dioxide retains heat, and even a small rise means a warming of the Earth's atmosphere. This may result in the melting of the polar ice caps with unusual speed, flooding the world before we have learned climate control. In reverse, our industrial civilization is making our atmosphere dustier so that it reflects more sunlight away and cools the Earth slightly — thus making possible a glacial advance in a few centuries, also before we have learned climate control.

I believe that only scientists can understand the universe. It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong.

Individual science fiction stories may seem as trivial as ever to the blinder critics and philosophers of today — but the core of science fiction, its essence, the concept around which it revolves, has become crucial to our salvation if we are to be saved at all.

I make no secret about being Jewish ... I just think it's more important to be human and to have a human heritage; and I think it is wrong for anyone to feel that there is anything special about any one heritage of whatever kind. It is delightful to have the human heritage exist in a thousand varieties, for it makes for greater interest, but as soon as one variety is thought to be more important than another, the groundwork is laid for destroying them all.