All what we think and know is an illusion. Nothing exists. Everything is an opinion.

By far the most important consequence of the conceptual revolution brought about in physics by relativity and quantum theory lies not in such details as that meter sticks shorten when they move or that simultaneous...

There is also hope that even in these days of increasing specialization there is a unity in the human experience.

Coelorum perrupit claustra.He broke through the barriers of the skies.[Herschel’s epitaph]

The European talks of progress because by the aid of a few scientific discoveries he has established a society which has mistaken comfort for civilisation.

Life on Earth is not the result of a series of miracles performed by a supernatural god-creator, and it is definitely not a product of matter having a mind of its own, of an equally...

The determination of the average man is not merely a matter of speculative curiosity; it may be of the most important service to the science of man and the social system. It ought necessarily to...

Science seeks the truth. And it does not discriminate. For better or worse it finds things out. Science is humble. It knows what it knows and it knows what it doesn’t know. It bases its...

A grain in the balance will determine which individual shall live and which shall die – which variety or species shall increase in number, and which shall decrease, or finally become extinct.

You say that it is time to shake off the Mist, but Mankind walks in a Mist; that Reason which you cry up as the Glory of this Age is a Proteus and Cameleon that...

A Muslim must not hate his wife and if he be displeased with one bad quality in her, then let him be pleased with another that is good.

Interviewer: Didn’t Sagan want to believe?Druyan: he didn’t want to believe. he wanted to know.

Science is not only compatible with spirituality; it is a profound source of spirituality.

All organisms vary. It is in the highest degree improbable that any given variety should have exactly the same relations to surrounding conditions as the parent stock. In that case it is either better fitted...

Some 3.6 million years ago, in what is now northern Tanzania, a volcano erupted, the resulting cloud of ash covering the surrounding savannahs. In 1979, the paleoanthropologist Mary Leakey found in that ash footprints –...

Even in Europe a change has sensibly taken place in the mind of man. Science has liberated the ideas of those who read and reflect, and the American example has kindled feelings of right in...

I find these comparisons particularly poignant: life versus death, hope versus fear. Space exploration and the highly mechanized destruction of people use similar technology and manufacturers, and similar human qualities of organization and daring. Can...

[J]ust as in the sciences we have learned that we are too ignorant to safely pronounce anything impossible, so for the individual, since we cannot know just what are his limitations, we can hardly say...

According to analyses conducted by the U.S. Department of Agriculture, 100 grams of fresh tomato today has 30 percent less vitamin C, 30 percent less thiamin, 19 percent less niacin, and 62 percent less calcium...

Palaeontology is the Aladdin’s lamp of the most deserted and lifeless regions of the earth; it touches the rocks and there spring forth in orderly succession the monarchs of the past and the ancient river...

Just as we have created a society in which it would be unthinkable to light up a cigarette in the Kennedy Center lobby, we can create a society where it is unthinkable that a child...

Your Excellency, I have no need of this hypothesis.

At last everything was satisfactorily arranged, and I could not help admiring the setting: these mingled touches betrayed on a small scale the inspiration of a poet, the research of a scientist, the good taste...

In the beginning there was nothing, which exploded.

The evolution of the human race will not be accomplished in the ten thousand years of tame animals, but in the million years of wild animals, because man is, and always will be, a wild...

Yalan söylemek kolaydır ama devam ettirmek zordur.

What is it with science these days? Everyone is so quick to believe in it, in all these new scientific discoveries, new pills for this, new pills for that. Get thinner, grow hair, yada, yada,...

We can distinguish three groups of scientific men. In the first and very small group we have the men who discover fundamental relations. Among these are van’t Hoff, Arrhenius and Nernst. In the second group...

Nothing exists except atoms and empty space; everything else is opinion.

We do not belong to this material world that science constructs for us. We are not in it; we are outside. We are only spectators. The reason why we believe that we are in it,...

Natural science is founded on minute critical views of the general order of events taking place upon our globe, corrected, enlarged, or exalted by experiments, in which the agents concerned are placed under new circumstances,...

There’s so much knowledge to be had that specialists cling to their specialties as a shield against having to know anything about anything else. They avoid being drowned.

He who is not satisfied with a little, is satisfied with nothing .

It is well known that geometry presupposes not only the concept of space but also the first fundamental notions for constructions in space as given in advance. It only gives nominal definitions for them, while...

I believe in evolution in the sense that a short-tempered man is the successor of a crybaby.

God is not a scientific hypothesis that might rival evolution. To think he is reduces the Creator to a creature, a highly creative force within the universe. God is not an occupant of the universe...

The wrong approaches to faith and to skepticism are equally detrimental to the path. For the former declares its answers too soon and is later found false; the latter rejects sound answers altogether and hashes...

At best he read popular science magazines like the Scientific American he had now, to keep himself up-to-date, in layman’s terms, with physics generally. But even then his concentration was marred, for a lifetime’s habit...

With increasing distance, our knowledge fades, and fades rapidly. Eventually, we reach the dim boundary—the utmost limits of our telescopes. There, we measure shadows, and we search among ghostly errors of measurement for landmarks that...

Modern science knows much about such conflicts. We call the mental state that engenders it AMBIVALENCE: a collision between thought and feeling.

Pride is a fallacy. None of us are greater than the sum of our parts.

Professor [John] Tyndall once said the finest inspiration he ever received was from an old man who could scarcely read. This man acted as his servant. Each morning the old man would knock on the...

All space is relative. There is no such thing as size. The telescope and the microscope have produced a deadly leveling of great and small, far and near. The only little thing is sin, the...

It’s peculiar to me,’ she said, ‘that everybody pays so much attention to living and so little to dying. Why are these high-powered scientists always screwing around trying to prolong life instead of finding pleasant...

There were long stretches of DNA in between genes that didn’t seem to be doing very much; some even referred to these as “junk DNA,” though a certain amount of hubris was required for anyone...

There are few ways in which good people do more harm to those who take them seriously than to defend the gospel with arguments that won’t hold water. Many of the difficulties encountered by young...

In the year 1456 … a Comet was seen passing Retrograde between the Earth and the sun… Hence I dare venture to foretell, that it will return again in the year 1758.

I am perhaps more proud of having helped to redeem the character of the cave-man than of any other single achievement of mine in the field of anthropology.

Were these boys in their right minds? Here were two boys with good intellect, one eighteen and one nineteen. They had all the prospects that life could hold out for any of the young; one...

Please give it up. Fear it no less than the sensual passion, because it, too, may take up all your time and deprive you of your health, peace of mind and happiness in life.[Having himself...