The only thing that will redeem mankind is co-operation, and the first step towards co-operation lies in the hearts of individuals.

We see that experience plays an indispensable role in the genesis of geometry; but it would be an error thence to conclude that geometry is, even in part, an experimental science. If it were experimental it would be only approximative and provisional. And what rough approximation!...The object of geometry is the study of a particular 'group'; but the general group concept pre-exists... in our minds. It is imposed on us, not as form of our sense, but as form of our understanding. Only, from among all the possible groups, that must be chosen... will be... the standard to which we shall refer natural phenomena.Experience guides us in this choice without forcing it upon us; it tells us not which is the truest geometry, but which is the most convenient.Notice that I have been able to describe the fantastic worlds... imagined without ceasing to employ the language of ordinary geometry.

These numerous points at which money is withdrawn from circulation and accumulated in numerous individual hoards or potential money-capitals appears as so many obstacles to circulation, because they immobilise the money and deprive it of its capacity to circulate for a certain time.

Four snakes gliding up and down a hollow for no purpose that I could see - not to eat, not for love, but only gliding.

Riches are a good handmaid, but the worst mistress.

A great stock, though with small profits, generally increases faster than a small stock with great profits. Money, says the proverb, makes money. When you have a little, it is often easier to get more. The great difficulty is to get that little.

Love's great (and sole) originality is to make happiness indistinct from misery.

But deepest of all illusory Appearances, for hiding Wonder, as for many other ends, are your two grand fundamental world-enveloping Appearances, SPACE and TIME. These, as spun and woven for us from before Birth itself, to clothe our celestial ME for dwelling here, and yet to blind it, - lie all-embracing, as the universal canvas, or warp and woof, whereby all minor Illusions, in this Phantasm Existence, weave and paint themselves. In vain, while here on Earth, shall you endeavor to strip them off; you can, at best, but rend them asunder for moments, and look through.

Power is the near neighbour of necessity.

We collect individuals into 'kinds' by applying to them the Idea of Likeness.

I can't imagine a man really enjoying a book and reading it only once.

Correspondences are like small clothes before the invention of suspenders; it is impossible to keep them up.

At this very moment, I am suffering - as we say in French, j'ai mal. This event, crucial for me, is nonexistent, even inconceivable for anyone else, for everyone else. Except for God, if that word can have a meaning.

Consumption is also immediately production, just as in nature the consumption of the elements and chemical substances is the production of the plant.

Freedom of thought and of expression are not mere rights to be claimed. They have their roots deep in the existence of individuals as developing careers in time. Their denial and abrogation is an abdication of individuality and a virtual rejection of time as opportunity.

Know that death comes to everyone, and that wealth will sometimes be acquired, sometimes lost. Whatever griefs mortals suffer by divine chance, whatever destiny you have, endure it and do not complain. But it is right to improve it as much as you can, and remember this: Fate does not give very many of these griefs to good people.

The supreme maxim in scientific philosophising is this: wherever possible, logical constructions are to be substituted for inferred entities.

We are no nearer heaven on the top of Mount Cenis than at the bottom of the sea; take the distance with your astrolabe. They debase God even to the carnal knowledge of women, to so many times, and so many generations.

It is better to suffer, than to do, wrong.

Names and attributes must be accommodated to the essence of things, and not the essence to the names, since things come first and names afterwards.

The essence of education is that it be religious. Pray, what is religious education? A religious education is an education which inculcates duty and reverence. Duty arises from our potential control over the course of events. Where attainable knowledge could have changed the issue, ignorance has the guilt of vice. And the foundation of reverence is this perception, that the present holds within itself the complete sum of existence, backwards and forwards, that whole amplitude of time, which is eternity.

As a way of maintaining relative intellectual independence, having the attitude of an amateur instead of a professional is a better course.

The human understanding when it has once adopted an opinion (either as being the received opinion or as being agreeable to itself) draws all things else to support and agree with it. And though there be a greater number and weight of instances to be found on the other side, yet these it either neglects and despises, or else by some distinction sets aside and rejects, in order that by this great and pernicious predetermination the authority of its former conclusions may remain inviolate.

The notion of nothingness is not characteristic of laboring humanity: those who toil have neither time nor inclination to weigh their dust; they resign themselves to the difficulties or the doltishness of fate; they hope: hope is a slave's virtue.

Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it. This famous statement has produced many paraphrases and variants: Those who cannot learn from history are doomed to repeat it. Those who do not remember their past are condemned to repeat their mistakes. Those who do not read history are doomed to repeat it. Those who fail to learn from the mistakes of their predecessors are destined to repeat them. Those who do not know history's mistakes are doomed to repeat them.

A third illusion haunts us, that a long duration, as a year, a decade, a century, is valuable. But an old French sentence says, "God works in moments," - "En peu d'heure Dieu labeure." We ask for long life, but 't is deep life, or grand moments, that signify. Let the measure of time be spiritual, not mechanical. Life is unnecessarily long. Moments of insight, of fine personal relation, a smile, a glance, - what ample borrowers of eternity they are! Life culminates and concentrates; and Homer said, "The Gods ever give to mortals their appointed share of reason only on one day."

Virtue is debased by self-justification.

The world and life are one.

The world is all that is the case.

Anarchism is the only philosophy which brings to man the consciousness of himself; which maintains that God, the State, and society are non-existent, that their promises are null and void, since they can be fulfilled only through man's subordination.

I say, then, that belief is nothing but a more vivid, lively, forcible, firm, steady conception of an object, than what the imagination alone is ever able to attain.

Diversity makes critical argument fruitful. ...[P]artners in an argument must share ...the wish to know, and the readiness to learn from the other ...by severely criticizing his views... and hearing... [the] reply. ...the so-called method of science consists in this kind of criticism.

Not to be loved is a misfortune, but it is an insult to be loved no longer.

The painter is turning his eyes towards us only in so far as we happen to occupy the same position as his subject. We, the spectators, are an additional factor. Though greeted by that gaze, we are also dismissed by it, replaced by that which was always there before we were: the model itself. But, inversely, the painter's gaze, addressed to the void confronting him outside the picture, accepts as many models as there are spectators; in this precise but neutral place, the observer and the observed take part in a ceaseless exchange.

Justice is what love looks like in public.

The law will never make men free; it is men who have got to make the law free.

I say that man without the grace of God nonetheless remains the general omnipotence of God who effects, and moves and impels all things in a necessary, infallible course; but the effect of man's being carried along is nothing--that is, avails nothing in God's sight, nor is reckoned to be anything but sin.

Paper, they say, does not blush, but I assure you it's not true and that it's blushing just as I am now, all over.

The progress of civilization necessitates the giving of greater and greater attention and intelligence to public affairs. And for this reason I am convinced that we make a great mistake in depriving one sex of voice in public matters, and that we could in no way so increase the attention, the intelligence and the devotion which may be brought to the solution of social problems as by enfranchising our women.

It has been proved by the biological speculations of past time, that organic Life cannot rightly be resolved into mechanical or chemical forces, or the operation of a vital fluid, or of a soul.

To read is to let someone else work for you - the most delicate form of exploitation.

The universities are schools of education, and schools of research. But the primary reason for their existence is not to be found either in the mere knowledge conveyed to the students or in the mere opportunities for research afforded to the members of the faculty. Both these functions could be performed at a cheaper rate, apart from these very expensive institutions. Books are cheap, and the system of apprenticeship is well understood. So far as the mere imparting of information is concerned, no university has had any justification for existence since the popularization of printing in the fifteenth century. Yet the chief impetus to the foundation of universities came after that date, and in more recent times has even increased. The justification for a university is that it preserves the connection between knowledge and the zest of life, by uniting the young and the old in the imaginative consideration of learning.

Inasmuch as love grows in you, in so much beauty grows; for love is itself the beauty of the soul.

To think is to run after insecurity, to be demoralized for grandiose trifles, to immure oneself in abstractions with a martyr's avidity, to hunt up complications the way others pursue collapse or gain. The thinker is by definition keen for torment.