Natural selection is an extremely simple process, in the sense that very little machinery needs to be set up in order for it to work. Of course the effects and consequences of natural selection are complex in the extreme. But in order to set natural selection going on a real planet, all that is required is the existence of inherited information.

He who has thought most deeply loves what is most alive.

Simplify the social system, in the manner which every motive, but those of usurpation and ambition, powerfully recommends; render the plain dictates of justice level to every capacity; remove the necessity of implicit faith; and we may expect the whole species to become reasonable and virtuous.

I found there, on the central square (Václavské náměstí), a café that miraculously worked through this emergency. I remember they had wonderful strawberry cakes, and I was sitting there eating strawberry cakes and watching Russian tanks against demonstrators. It was perfect.

If a king is energetic, his subjects will be equally energetic. If he is reckless, they will not only be reckless likewise, but also eat into his works. Besides, a reckless king will easily fall into the hands of his enemies. Hence the king shall ever be wakeful.

And that you may know... what kind of writings I mean, I shall name to you the learned Gassendus his little Syntagma of Epicurus's philosophy, and that most ingenious gentleman Monsieur Descartes his principles of philosophy. For though I purposely refrained, though not altogether from transiently consulting about a few particulars, yet from seriously and orderly reading over those excellent (though disagreeing) books, or so much as Sir Francis Bacon's Novum Organum, that I might not be prepossessed with any theory or principles, till I had spent some time in trying what things themselves would incline me to think; yet beginning now to allow myself to read those excellent books, I find by the little I have read in them already, that if I had read them before I began to write, I might have enriched the ensuing essays with divers truths, which they now want, and have explicated divers things much better than I fear I have done.

There is something which unites magic and applied science while separating both from the wisdom of earlier ages. For the wise men of old the cardinal problem had been how to conform the soul to reality, and the solution had been knowledge, self-discipline, and virtue. For magic and applied science alike the problem is how to subdue reality to the wishes of men.

Neither will the horse be adjudged to be generous, that is sumptuously adorned, but the horse whose nature is illustrious; nor is the man worthy who possesses great wealth, but he whose soul is generous.

An intellectual dapperling of these times boasts chiefly of his irresistible perspicacity, his "dwelling in the daylight of truth," and so forth; which, on examination, turns out to be a dwelling in the rush-light of "closet logic," and a deep unconsciousness that there is any other light to dwell in or any other objects to survey with it.

Men all say, "We are wise"; but being driven forward and taken in a net, a trap, or a pitfall, they know not how to escape. Men all say, "We are wise"; but happening to choose the course of the Mean, they are not able to keep it for a round month.

The physicist who states a law of nature with the aid of a mathematical formula is abstracting a real feature of a real material world, even if he has to speak of numbers, vectors, tensors, state-functions, or whatever to make the abstraction.

This legible lesson, this ritual recording, must be repeated as often as possible; the punishments must be a school rather than a festival; an ever-open book rather than a ceremony. The duration that makes the punishment effective for the guilty is also useful for the spectators. They must be able to consult at each moment the permanent lexicon of crime and punishment. A secret punishment is a punishment half wasted. Children should be allowed to come to the places where the penalty is being carried out; there they will attend their classes in civics. And grown men will periodically relearn the laws. Let us conceive of places of punishment as a Garden of the Laws that families would visit on Sundays.

Would not anyone who is a man have his slumbers broken by a war-trumpet rather than by a chorus of serenaders?

The State is always, whatever be its form - primitive, ancient, medieval, modern - an invitation issued by one group of men to other human groups to carry out some enterprise in common. That enterprise, be its intermediate processes what they may, consists in the long run in the organisation of a certain type of common life. ... [As Renan says,] "To have common glories in the past, a common will in the present; to have done great things together; to wish to do greater; these are the essential conditions which make up a people.... In the past, an inheritance of glories and regrets; in the future, one and the same programme to carry out.... The existence of a nation is a daily plebiscite."

Society should treat all equally well who have deserved equally well of it, that is, who have deserved equally well absolutely. This is the highest abstract standard of social and distributive justice; towards which all institutions, and the efforts of all virtuous citizens, should be made in the utmost degree to converge.

As we can not give a general definition of energy, the principle of the conservation of energy signifies simply that there is something which remains constant.

The great man, whether we comprehend him in the most intense activity of his work or in the restful equipoise of his forces, is powerful, involuntarily and composedly powerful, but he is not avid for power. What he is avid for is the realization of what he has in mind, the incarnation of the spirit.

Tis the sharpness of our mind that gives the edge to our pains and pleasures.

I can prove now, for instance, that two human hands exist. How? By holding up my two hands, and saying, as I make a certain gesture with the right hand, "Here is one hand," and adding, as I make a certain gesture with the left, "and here is another." And if, by doing this, I have proved ipso facto the existence of external things, you will all see that I can also do it now in numbers of other ways: there is no need to multiply examples.

Whenever our neighbour's house is on fire, it cannot be amiss for the engines to play a little on our own.

I know no safe depository of the ultimate powers of the society but the people themselves; and if we think them not enlightened enough to exercise their control with wholesome discretion, the remedy is not to take it from them, but to inform their discretion by education. This is the true corrective of abuses of constitutional power.

The range of socially permissible and desirable satisfaction is greatly enlarged, but through this satisfaction, the Pleasure Principle is reduced-deprived of the claims which are irreconcilable with the established society. Pleasure, thus adjusted, generates submission.

We are organization watchers in our role as citizens. Increasing attention has been fixed in recent years upon the functioning of society's organizations: its large corporations and its governments. Hence this could also be described as a book for Everyman-for it proposes a way of thinking about organizational issues that concern us all.

Let us not pretend to doubt in philosophy what we do not doubt in our hearts.

And above all, we must feel and act as if an endless continuation of our earthly life awaited us after death; and if it be that nothingness is the fate that awaits us we must not, in the words of Obermann, so act that it shall be a just fate.

Whether or no it be for the general good, life is robbery. It is at this point that with life morals become acute. The robber requires justification.

A mind does not receive truth as a chest receives jewels that are put into it, but as the stomach takes up food into the system. It is no longer food, but flesh, and is assimilated. The appetite and the power of digestion measure our right to knowledge. He has it who can use it. As soon as our accumulation overruns our invention or power to use, the evils of intellectual gluttony begin,- congestion of the brain, apoplexy, and strangulation.

Truth and clarity are complementary.

The political freedom of conscience and of the press, so far from being as it is commonly supposed an extension, is a new case of the limitation of rights and discretion. Conscience and the press ought to be unrestrained, not because men have a right to deviate from the exact line that duty prescribes, but because society, the aggregate of individuals, has no right to assume the prerogative of an infallible judge, and to undertake authoritatively to prescribe to its members in matters of pure speculation.

Man is the measure of all things: of things which are, that they are, and of things which are not, that they are not.

There are two kinds of pleasure: one consisting in a state of rest, in which both body and mind are undisturbed by any kind of pain; the other arising from an agreeable agitation of the senses, producing a correspondent emotion in the soul. It is upon the former of these that the enjoyment of life chiefly depends. Happiness may therefore be said to consist in bodily ease, and mental tranquility.

To train and educate the rising generation will at all times be the first object of society, to which every other will be subordinate.

There is a freemasonry among the dull by which they recognize and are sociable with the dull, as surely as a correspondent tact in men of genius.

I know, indeed, that some honest men fear that a republican government can not be strong, that this Government is not strong enough; but would the honest patriot, in the full tide of successful experiment, abandon a government which has so far kept us free and firm on the theoretic and visionary fear that this Government, the world's best hope, may by possibility want energy to preserve itself? I trust not.

As an eminent pioneer in the realm of high frequency currents... I congratulate you on the great successes of your life's work.

We were halves throughout, and to that degree that, methinks, by outliving him I defraud him of his part.

Arms are not yet taken up; but virtually, you are in a civil war. You are not people of differing opinions in a public council;-you are enemies, that must subdue or be subdued, on the one side or the other. If your hands are not on your swords, their knives will be at your throats. There is no medium,-there is no temperament,-there is no compromise with Jacobinism.

Equity knows no difference of sex. In its vocabulary the word man must be understood in a generic, and not in a specific sense.

The woman wants to dominate, the man wants to be dominated.

The proletarian works with the instruments of production of another, for the account of this other, in exchange for a part of the product. ... The proletarian liberates himself by abolishing competition, private property, and all class differences.

To be in touch with senses and emotions beyond conquest is to enter the realm of the mysterious.

It was the case of common soldiers deserting from their officers, to join a furious, licentious populace. It was a desertion to a cause, the real object of which was to level all those institutions, and to break all those connexions, natural and civil, that regulate and hold together the community by a chain of subordination; to raise soldiers against their officers; servants against their masters; tradesmen against their customers; artificers against their employers; tenants against their landlords; curates against their bishops; and children against their parents. That this cause of theirs was not an enemy to servitude, but to society.

The liberty of man consists solely in this: that he obeys natural laws because he has himself recognized them as such, and not because they have been externally imposed upon him by any extrinsic will whatever, divine or human, collective or individual.

There are two atheisms of which one is a purification of the notion of God.

Time is a game played beautifully by children.

Necessity gives the law without itself acknowledging one.

We boil at different degrees.

Generally speaking, espionage offers each spy an opportunity to go crazy in a way he finds irresistible.