Arthur C. Clarke

One of the English science-fiction writers once said, "Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering." ... I must say I agree with him.

Meanwhile, among all its countless other effects upon human culture, Starglider had brought to its climax a process that was already well under way. It had put an end to the billions of the words of pious gibberish with which apparently intelligent men had addled their minds for centuries.

I don't believe in God but I'm very interested in her.

To obtain a mental picture of the distance to the nearest star, compared to the nearest planet, you must imagine a world in which the closest object to you is only five feet away — and there is nothing else to see until you have travelled a thousand miles.

A single test which proves some piece of theory wrong is more valuable than a hundred tests showing that idea might be true.

Maybe those nihilist philosophers are right; maybe this is all we can expect of the universe, a relentless crushing of life and spirit, because the equilibrium state of the cosmos is death...

SETI is probably the most important quest of our time, and it amazes me that governments and corporations are not supporting it sufficiently.

Space can be mapped and crossed and occupied without definable limit; but it can never be conquered. When our race has reached its ultimate achievements, and the stars themselves are scattered no more widely than the seed of Adam, even then we shall still be like ants crawling on the face of the Earth. The ants have covered the world, but have they conquered it — for what do their countless colonies know of it, or of each other?
So it will be with us as we spread out from Earth, loosening the bonds of kinship and understanding, hearing faint and belated rumors at second — or third — or thousandth hand of an ever dwindling fraction of the entire human race. Though the Earth will try to keep in touch with her children, in the end all the efforts of her archivists and historians will be defeated by time and distance, and the sheer bulk of material. For the numbers of distinct human societies or nations, when our race is twice its present age, may be far greater than the total number of all the men who have ever lived up to the present time.
We have left the realm of comprehension in our vain effort to grasp the scale of the universe; so it must ever be, sooner rather than later.

If children have interests then education happens.

When an official declares something false, chances are that it is. When he or she says it is absolutely false, chances are it is true. ... The overemphasis sticks out like Pinocchio's nose.

The rash assertion that 'God made man in His own image' is ticking like a time bomb at the foundation of many faiths, and as the hierarchy of the universe is disclosed to us, we may have to recognize this chilling truth: if there are any gods whose chief concern is man, they cannot be very important gods.

This is the first age that's ever paid much attention to the future, which is a little ironic since we may not have one.

The fates could not possibly be so malevolent, now that he had only a few hundred meters to go.
He was whistling in the dark, of course. How many aircraft had crashed at the very edge of the runway, after safely crossing an ocean? How many times had machines or muscles failed when there were only millimeters to go? Every possible piece of luck, bad as well as good, happened to somebody, somewhere. He had no right to expect any special treatment.

I now spend a good part of my day dreaming of times past, present and future. As I try to survive on 15 hours sleep a day, I have plenty of time to enjoy vivid dreams. Being completely wheel-chaired doesn't stop my mind from roaming the universe — on the contrary!

One of the biggest roles of science fiction is to prepare people to accept the future without pain and to encourage a flexibility of mind. Politicians should read science fiction, not westerns and detective stories. Two-thirds of 2001 is realistic — hardware and technology — to establish background for the metaphysical, philosophical, and religious meanings later.

It has yet to be proven that intelligence has any survival value.

Even though you were once a goddess, Kalidasa’s heaven was only an illusion.

As our own species is in the process of proving, one cannot have superiorscience and inferior morals. The combination is unstable and self-destroying.

The Ramans do everything in threes.

Through long and bitter experience, Rajasinghe had learned never to trust first impressions, but also never to ignore them.