In the development of any science, the first received paradigm is usually felt to account quite successfully for most of the observations and experiments easily accessible to that science's practitioners. Further development, therefore, ordinarily calls for the construction of elaborate equipment, the development of an esoteric vocabulary and skills, and a refinement of concepts that increasingly lessens their resemblance to their usual common-sense prototypes. That professionalization leads, on the one hand, to an immense restriction of the scientist's vision and to a considerable resistance to paradigm change. The science has become increasingly rigid. On the other hand, within those areas to which the paradigm directs the attention of the group, normal science leads to a detail of information and to a precision of the observation-theory match that could be achieved in no other way.

You rejoice in having made a convert to Atheism. I think there is something unnatural in a zeal of proselytism in an Atheist. I do not believe in an intellectual God, a God made after the image of man. In the vulgar acceptation of the word, therefore, I think a man is right who does not believe in God, but I am also persuaded that a man is wrong who is without religion.

In fact writing a computer program is a pretty good way to summarize knowledge about any set of rules.

His Mohammed, as has been said, commands that ruling is to be done by the sword, and in his Koran the sword is the commonest and noblest work. Thus the Turk is, in truth, nothing but a murderer or highwayman, as his deeds show before men's eyes.

Evolution is a fact. Beyond reasonable doubt, beyond serious doubt, beyond sane, informed, intelligent doubt, beyond doubt evolution is a fact. The evidence for evolution is at least as strong as the evidence for the Holocaust, even allowing for eye witnesses to the Holocaust. It is the plain truth that we are cousins of chimpanzees, somewhat more distant cousins of monkeys, more distant cousins still of aardvarks and manatees, yet more distant cousins of bananas and turnips... continue the list as long as desired.

Ethical control may survive in small groups, but the control of the population as a whole must be delegated to specialists-to police, priests, owners, teachers, therapists, and so on, with their specialized reinforcers and their codified contingencies.

Everywhere in life, the true question is not what we gain, but what we do.

Do you ask me whom I have conquered? Neither the Persians, nor the far-off Medes, nor any warlike race that lies beyond the Dahae; not these, but greed, ambition, and the fear of death that has conquered the conquerors of the world.

Philosophy is not politics, and we do our best, within our all-too-human limitations, to seek the truth, not to score points against opponents. There is little satisfaction in gaining an easy triumph over a weak opponent while ignoring better arguments against your views. 

If you use a trick in logic, whom can you be tricking other than yourself?

What chance has Vulcan against Roberts & Co., Jupiter against the lightning-rod and Hermes against the Credit Mobilier? All mythology overcomes and dominates and shapes the forces of nature in the imagination and by the imagination; it therefore vanishes with the advent of real mastery over them.

Cannot we understand how these men worshipped Canopus; became what we call Sabeans, worshipping the stars? Such is to me the secret of all forms of Paganism. Worship is transcendent wonder; wonder for which there is now no limit or measure; that is worship.

What the public wants is the image of passion, not passion itself.

Whatsoever is not beaverish seems to go forth in the shape of talk. To such length is human intellect wasted or suppressed in this world!

Perfectibility is one of the most unequivocal characteristics of the human species.

He would be the finer gentleman that should leave the world without having tasted of lying or pretence of any sort, or of wantonness or conceit.

The system of banking we have both equally and ever reprobated. I contemplate it as a blot left in all our Constitutions, which, if not covered, will end in their destruction, which is already hit by the gamblers in corruption, and is sweeping away in its progress the fortunes and morals of our citizens. Funding I consider as limited, rightfully, to a redemption of the debt within the lives of a majority of the generation contracting it; every generation coming equally, by the laws of the Creator of the world, to the free possession of the earth he made for their subsistence, unincumbered by their predecessors, who, like them, were but tenants for life.

Faith is the great cop-out, the great excuse to evade the need to think and evaluate evidence. Faith is belief in spite of, even perhaps because of, the lack of evidence.

There's something that remains barbarous in educated people, and lately I've more and more had the feeling that we are nonwondering primitives. And why is it that we no longer marvel at these technological miracles? They've become the external facts of every life. We've all been to the university, we've had introductory courses in everything, and therefore we have persuaded ourselves that if we had the time to apply ourselves to these scientific marvels, we would understand them. But of course that's an illusion. It couldn't happen. Even among people who have had careers in science. They know no more about how it all works than we do. So we are in the position of savage men who, however, have been educated into believing that they are capable of understanding everything. Not that we actually do understand, but that we have the capacity.

Political thought and political instinct prove themselves theoretically and practically in the ability to distinguish friend and enemy. The high points of politics are simultaneously the moments in which the enemy is, in concrete clarity, recognized as the enemy.

Now, to-day, this moment, is our chance to choose the right side. God is holding back to give us that chance. It will not last for ever. We must take it or leave it.

Students have powerful images of what a perfect body is and pursue it incessantly. But deprived of literary guidance, they no longer have any image of a perfect soul, and hence do not long to have one.

Resolve to serve no more, and you are at once freed. I do not ask that you place hands upon the tyrant to topple him over, but simply that you support him no longer; then you will behold him, like a great Colossus whose pedestal has been pulled away, fall of his own weight and break in pieces.

Naturally, every age thinks that all ages before it were prejudiced, and today we think this more than ever and are just as wrong as all previous ages that thought so. How often have we not seen the truth condemned! It is sad but unfortunately true that man learns nothing from history.

One of the most exquisite pleasures of human love - to serve the loved one without his knowing it - is only possible, as regards the love of God, through atheism.

If man of himself could in a perfect manner know all things visible and invisible, it would indeed be foolish to believe what he does not see. But our manner of knowing is so weak that no philosopher could perfectly investigate the nature of even one little fly.

For as when much superfluous matter has gathered in simple bodies, nature makes repeated efforts to remove and purge it away, thereby promoting the health of these bodies, so likewise as regards that composite body the human race, when every province of the world so teems with inhabitants that they can neither subsist where they are nor remove elsewhere, every region being equally crowded and over-peopled, and when human craft and wickedness have reached their highest pitch, it must needs come about that the world will purge herself in one or another of these three ways, to the end that men, becoming few and contrite, may amend their lives and live with more convenience.

I wish to write such rhymes as shall not suggest a restraint, but contrariwise the wildest freedom.

Although meaningless in a tribal context, numbers and statistics assume mythic and magical qualities of infallibility in literate societies.

At this point of his effort man stands face to face with the irrational. He feels within him his longing for happiness and for reason. The absurd is born of this confrontation between the human need and the unreasonable silence of the world. This must not be forgotten. This must be clung to because the whole consequence of a life can depend on it. The irrational, the human nostalgia, and the absurd that is born of their encounter, these are the three characters in the drama that must necessarily end with all the logic of which an existence is capable.

Now the mass of mankind are plainly... choosing a life like that of brute animals...

We accepted a definition of ourselves which confined the self to the source and to the limitations of conscious attention. This definition is miserably insufficient, for in fact we know how to grow brains and eyes, ears and fingers, hearts and bones, in just the same way that we know how to walk and breathe, talk and think-only we can't put it into words. Words are too slow and too clumsy for describing such things, and conscious attention is too narrow for keeping track of all their details.

An honest man nearly always thinks justly.

The supporters of the Development Hypothesis... can show that any existing species-animal or vegetable-when placed under conditions different from its previous ones, immediately begins to undergo certain changes fitting it for the new conditions. They can show that in successive generations these changes continue; until, ultimately, the new conditions become the natural ones. They can show that in cultivated plants, in domesticated animals, and in the several races of men, such alterations have taken place. They can show that the degrees of difference so produced are often, as in dogs, greater than those on which distinctions of species are in other cases founded.

The inversion of external compulsion into the compulsion of conscience ... produces the machine-like assiduity and pliable allegiance required by the new rationality.

Purity is for man, next to life, the greatest good that parity is procured by the Law of Mazda to him who cleanses his own self with Good Thoughts, Words, and Deeds.

The successful revolutionary is a statesman, the unsuccessful one a criminal.

Every explanation is after all an hypothesis.