Philosophy is a hypothetical interpretation of the unknown (as in metaphysics), or of the inexactly known (as in ethics or political philosophy); it is the front trench in the siege of truth.

No particular experiences are linked with any particular statements in the interior of the field, except indirectly through considerations of equilibrium affecting the field as a whole.

We have here a question of difficulty, analogous to the question of nominalism and realism.

Ten years ago, you could have traveled thousands of miles through the United States and never seen a baseball cap turned back to front. Today, the reverse baseball cap is ubiquitous. I do not know what the pattern of geographical spread of the reverse baseball cap precisely was, but epidemiology is certainly among the professions primarily qualified to study it.

Unrighteous fortune seldom spares the highest worth; no one with safety can long front so frequent perils. Whom calamity oft passes by she finds at last.

Revolution is like the daughters of Pelias: it cuts humanity to pieces in order to rejuvenate it.

To wish to escape from solitude is cowardice. Friendship is not to be sought, not to be dreamed, not to be desired; it is to be exercised (it is a virtue).

He who bases or thinks he bases his conduct - his inward or his outward conduct, his feeling or his action - upon a dogma or a principle which he deems incontrovertible, runs the risk of becoming a fanatic, and moreover, the moment that this dogma is weakened or shattered, the morality based upon it gives way. If the earth that he thought firm begins to rock, he himself trembles at the earthquake, for we do not all come up to the standard of the ideal Stoic who remains undaunted among the ruins of a world shattered into atoms. Happily the stuff that is underneath a man's ideas will save him. For if a man should tell you that he does not defraud or cuckold his best friend only because he is afraid of hell, you may depend upon it that neither would he do so even if he were to cease to believe in hell, but that he would invent some other excuse instead. And this is all to the honor of the human race.

...no legislator, at any period of the world, has willingly placed the seat of active power in the hands of the multitude: Because there it admits of no control, no regulation; no steady direction whatsoever. The people are the natural control on authority; but to exercise and to control together is contradictory and impossible.

Death is the most blessed dream.

Undeterred by this examination, the French Revolution gave rise to ideas which led beyond the ideas of the entire old world order. The revolutionary movement which began in 1789 in the Cercle Social, which in the middle of its course had as its chief representatives Leclerc and Roux, and which finally with Babeuf's conspiracy was temporarily defeated, gave rise to the communist idea which Babeuf's friend Buonarroti re-introduced in France after the Revolution of 1830. This idea, consistently developed, is the idea of the new world order.

Should I not be proud, when for twenty years I have had to admit to myself that the great Newton and all the mathematicians and noble calculators along with him were involved in a decisive error with respect to the doctrine of color, and that I among millions was the only one who knew what was right in this great subject of nature?

There is no city that is truly one other than this city that we are involved in bringing forth.

The real discovery is the one which enables me to stop doing philosophy when I want to. The one that gives philosophy peace, so that it is no longer tormented by questions which bring itself into question.

The first statement of the two principles reads as follows. First: each person is to have an equal right to the most extensive basic liberty compatible with a similar liberty for others. Second: social and economic inequalities are to be arranged so that they are both (a)reasonably expected to be to everyone's advantage, and (b) attached to positions and offices open to all.

My purpose is to set forth a very new science dealing with a very ancient subject. There is, in nature, perhaps nothing older than motion, concerning which the books written by philosophers are neither few nor small; nevertheless I have discovered by experiment some properties of it which are worth knowing and which have not hitherto been either observed or demonstrated. Some superficial observations have been made, as, for instance, that the free motion [naturalem motum] of a heavy falling body is continuously accelerated; but to just what extent this acceleration occurs has not yet been announced; for so far as I know, no one has yet pointed out that the distances traversed, during equal intervals of time, by a body falling from rest, stand to one another in the same ratio as the odd numbers beginning with unity.

The Hindoos are most serenely and thoughtfully religious than the Hebrews. They have perhaps a purer, more independent and impersonal knowledge of God. Their religious books describe the first inquisitive and contemplative access to God; the Hebrew bible a conscientious return, a grosser and more personal repentance. Repentance is not a free and fair highway to God. A wise man will dispense with repentance. It is shocking and passionate. God prefers that you approach him thoughtful, not penitent, though you are chief of sinners. It is only by forgetting yourself that you draw near to him. The calmness and gentleness with which the Hindoo philosophers approach and discourse on forbidden themes is admirable. In 1853.

Patriotism, when it wants to make itself felt in the domain of learning, is a dirty fellow who should be thrown out of doors.

Statues are not about history. We don't memorialize each piece of history. We memorialize things that we want to value and things that we want our children to walk by and say "This person embodied the values that I care about." Therefore, statues are about values not about history.

A critique is not a matter of saying that things are not right as they are. It is a matter of pointing out on what kinds of assumptions, what kinds of familiar, unchallenged, unconsidered modes of thought the practices that we accept rest.

The word 'definition' has come to have a dangerously reassuring sound, owing no doubt to its frequent occurrence in logical and mathematical writings.

Having given up autonomy, reason has become an instrument.

I felt less alone when I didn't know you yet: I was waiting for the other. I thought only of his strength and never of my weakness. And now here you are, Orestes, it was you. I look at you and I see that we are two orphans.

Bad company is as instructive as licentiousness. One makes up for the loss of one's innocence with the loss of one's prejudices.

I've had letters from Chinese scientists at the peak of the SARS epidemic who said the problem is a hybridization between the viruses planted into GMO feed, which is then fed to animals, then the virus jumped from the animals to humans. We're going to see more and more of these kinds of risks. I think the whole issue of the H1N1 virus was the fact that it had genes for three influenza types--human, chicken, pig. All of these crossings are becoming possible because of the crossing of genes across species barriers.

Those who have racked their brains to discover new proofs have perhaps been induced to do so by a compulsion they could not quite explain to themselves. Instead of giving us their new proofs they should have explained to us the motivation that constrained them to search for them.

All the evolution we know of proceeds from the vague to the definite.

The normal present connects the past and the future through limitation. Contiguity results, crystallization by means of solidification. There also exists, however, a spiritual present that identifies past and future through dissolution, and this mixture is the element, the atmosphere of the poet.

Now about your family. Do you know that since your daughter came out everyone has been enraptured by her? They say she is amazingly beautiful.

Nothing is terrible except fear itself.

The very cannibalism of the counterrevolution will convince the nations that there is only one way in which the murderous death agonies of the old society and the bloody birth throes of the new society can be shortened, simplified and concentrated, and that way is revolutionary terror.

The eros-driven soul produces beautiful things, and, above all, beautiful actions, which have a universal value.

God said, I am tired of kings, I suffer them no more; Up to my ear the morning brings The outrage of the poor.

I believe that the fundamental alternative for man is the choice between "life" and "death"; between creativity and destructive violence; between reality and illusions; between objectivity and intolerance; between brotherhood-independence and dominance-submission.

My own view is that philosophy at its best has always, in every period, included some philosophers who brilliantly represent the moral face of the subject and some philosophers who brilliantly represent the theoretical face, as well as some geniuses whose insights span and unite both sides of the subject. To renounce either the moral ambitions of philosophy or its theoretical ambitions is not just to kill the subject of philosophy; it is to commit intellectual and spiritual suicide.

Some have made the love of God the foundation of morality. This, too, is but a branch of our moral duties, which are generally divided into duties to God and duties to man. If we did a good act merely from the love of God and a belief that it is pleasing to Him, whence arises the morality of the Atheist? It is idle to say, as some do, that no such being exists. We have the same evidence of the fact as of most of those we act on, to-wit: their own affirmations, and their reasonings in support of them. I have observed, indeed, generally, that while in protestant countries the defections from the Platonic Christianity of the priests is to Deism, in catholic countries they are to Atheism. Diderot, D'Alembert, D'Holbach, Condorcet, are known to have been among the most virtuous of men. Their virtue, then, must have had some other foundation than the love of God.

Indeed it may be only by risking the incoherence of identity that connection is possible.

Men never respect what they have made themselves. This is why an elective king never possesses the moral power of a hereditary sovereign, because he is not noble enough, that is to say he does not possess that kind of greatness independent of men and that is the work of time.

This to the right, that to the left hand strays, and all are wrong, but wrong in different ways.

Everyone who is seriously involved in the pursuit of science becomes convinced that some spirit is manifest in the laws of the universe, one that is vastly superior to that of man.

If love does not know how to give and take without restrictions, it is not love, but a transaction that never fails to lay stress on a plus and a minus.

Man is a sun and his senses are the planets.

England is the paradise of individuality, eccentricity, heresy, anomalies, hobbies, and humors.

I have said that, in a sense, the parasites were a 'shadow' of man's cowardice and passivity. Their strength could increase in an atmosphere of defeat and panic, for it fed on human fear. In that case, the best way to combat them was to change the atmosphere to one of strength and purpose.

The greatness of America lies not in being more enlightened than any other nation, but rather in her ability to repair her faults.