He has begun by supposing that light has a constant velocity... the same in all directions. This... could never be verified directly by experiment... The postulate... resembling the principle of sufficient reason... furnishes us with a new rule for the investigation of simultaneity.

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 effect of liberty to individuals is, that they may do what they please: we ought to see what it will please them to do, before we risk congratulations.

What anger is has been sufficiently explained. The difference between it and irascibility is evident: it is the same as that between a drunken man and a drunkard; between a frightened man and a coward. It is possible for an angry man not to be irascible; an irascible man may sometimes not be angry. I shall omit the other varieties of anger, which the Greeks distinguish by various names, because we have no distinctive words for them in our language, although we call men bitter and harsh, and also peevish, frantic, clamorous, surly and fierce: all of which are different forms of irascibility.

Whatever is merely positive is lifeless. Negativity is essential to vitality.

Reason alone does not suffice.

The secret of happiness is to face the fact that the world is horrible, horrible, horrible.

There is simply too much to think about. It is hopeless - too many kinds of special preparation are required. In electronics, in economics, in social analysis, in history, in psychology, in international politics, most of us are, given the oceanic proliferating complexity of things, paralyzed by the very suggestion that we assume responsibility for so much. This is what makes packaged opinion so attractive.

There is nothing truly real, save that which feels, suffers, pities, loves and desires, save consciousness. And we need God in order to save consciousness; not in order to think existence, but in order to live it; not in order to know the why and how of it, but in order to feel the wherefore of it.

The philosophy of Bergson, which is a spiritualist restoration, essentially mystical, medieval, Quixotesque, has been called a demi-mondaine philosophy. Leave out the demi; call it mondaine, mundane. Mundane - yes, a philosophy for the world and not for philosophers, just as chemistry ought to be not for chemists alone. The world desires illusion (mundus vult decipi) - either the illusion antecedent to reason, which is poetry, or the illusion subsequent to reason, which is religion. And Machiavelli has said that whosoever wishes to delude will always find someone willing to be deluded. Blessed are they who are easily befooled!

Mind is infinite and self-ruled, and is mixed with nothing, but is alone itself by itself.

What is a rebel? A man who says no. 

My entire soul is a cry, and all my work the commentary on that cry.

It is the greatest of all mistakes to do nothing because you can only do little.

Man is forming thousands of ridiculous relations between himself and God.

Indeed, it is tempting to suppose that it is self evident that things should be so arranged so as to lead to the most good.

A whale is not a fish in natural history, but it is a fish in commerce and law. A plea that human laws which mention fish do not apply to whales, would be rejected at once by an intelligent judge.

The superior man, when resting in safety, does not forget that danger may come. When in a state of security he does not forget the possibility of ruin. When all is orderly, he does not forget that disorder may come. Thus his person is not endangered, and his States and all their clans are preserved.

A gifted humanity can only produce skeptics, never saints.

I've learned from the Bhagavad Gita and other teachings of our culture to detach myself from the results of what I do, because those are not in my hands. The context is not in your control, but your commitment is yours to make, and you can make the deepest commitment with a total detachment about where it will take you. You want it to lead to a better world, and you shape your actions and take full responsibility for them, but then you have detachment. And that combination of deep passion and deep detachment allows me always to take on the next challenge because I don't cripple myself, I don't tie myself in knots. I function like a free being. I think getting that freedom is a social duty because I think we owe it to each other not to burden each other with prescription and demands. I think what we owe each other is a celebration of life and to replace fear and hopelessness with fearlessness and joy.

Suicide is a sudden accomplishment, a lightning-like deliverance: it is nirvana by violence.

The totalitarian movements aim at and succeed in organizing masses-not classes, like the old interest parties of the Continental nation-states; not citizens with opinions about, interests in, the handling of public affairs, like the parties of Anglo-Saxon countries.

In order to abolish the idea of private property, the idea of communism is completely sufficient. It takes actual communist action to abolish actual private property. History will com to it; and this movement, which in theory we already know to be a self-transcending movement, will constitute in actual fact a very severe and protracted process. But we must regard it as a real advance to have gained beforehand a consciousness of the limited character a well as of the goal of this historical movement - and a consciousness which reaches out beyond it.

The pivot round which the religious life... revolves, is the interest of the individual in his private personal destiny. Religion, in short, is a monumental chapter in the history of human egotism. The gods believed in-whether by crude savages or by men disciplined intellectually-agree with each other in recognizing personal calls. Religious thought is carried on in terms of personality, this being, in the world of religion, the one fundamental fact. To-day, quite as much as at any previous age, the religious individual tells you that the divine meets him on the basis of his personal concerns.

I don't know what the life of a rascal is like since I have never been one, but that of an honest man is abominable. How few men are there whose passage on this stupid planet has been marked by really good and useful acts! I prostrate myself before the one of which one can say: pertransivit bene faciendo; the one who had been able to instruct, console, and relieve his fellows; the one who made great sacrifices for charity; these heroes of silent charity who hide themselves and expect nothing in this world. But what is the ordinary man? And how many are there in a thousand who can ask themselves without terror: what have I done in this world? In what way have I advanced the common good and what will remain of me of good or evil?

Many things about our bodies would not seem to us so filthy and obscene if we did not have the idea of nobility in our heads.

I am not virtuous. Our sons will be if we shed enough blood to give them the right to be.

When I see someone in anxiety, I say to myself, What can it be that this fellow wants? For if he did not want something that was outside of his control, how could he still remain in anxiety?

The plan we are advocating amounts essentially to this: that a certain small income, sufficient for necessaries, should be secured to all, whether they work or not, and that a larger income, as much larger as might be warranted by the total amount of commodities produced, should be given to those who are willing to engage in some work which the community recognizes as useful.

No man who has once heartily and wholly laughed can be altogether irreclaimably bad.

I am my world.

"For I am holy." When I hear these words I recognize the voice of the Saviour. But shall I take away my own? Certainly when He speaks thus He speaks in inseparable union with His body. But can I say, "I am holy"? If I mean a holiness that I have not received, I should be proud and a liar; but if I mean a holiness that I have received - as it is written: "Be ye holy because I the Lord your God am holy" (Lev. 19:2) - then let the body of Christ say these words. And let this one man, who cries from the ends of the earth, say with his Head and united with his Head: "I am holy." … That is not foolish pride, but an expression of gratitude. If you were to say that you are holy of yourselves, that would be pride; but if, as one of Christ's faithful and as a member of Christ, you say that you are not holy, you are ungrateful.

Proverbs are always platitudes until you have personally experienced the truth of them.

Our responsibility is much greater than we might have supposed, because it involves all mankind.

What appears as the positive is essentially the negative, i.e. the thing that is to be criticized.

There are no arguments. Can anyone who has reached the limit bother with arguments, causes, effects, moral considerations, and so forth? Of course not. For such a person there are only unmotivated motives for living. On the heights of despair, the passion for the absurd is the only thing that can still throw a demonic light on chaos. When all the current reasons - moral, esthetic, religious, social, and so on - no longer guide one's life, how can one sustain life without succumbing to nothingness? Only by a connection with the absurd, by love of absolute uselessness, loving something which does not have substance but which simulates an illusion of life. I live because the mountains do not laugh and the worms do not sing.

Let me give you a definition of ethics: It is good to maintain and further life - it is bad to damage and destroy life. And this ethic, profound and universal, has the significance of a religion. It is religion.

The operations of understanding thus divide the world into numberless polarities, and Hegel uses the expression 'isolated reflection' (isolierte Reflection) to characterize the manner in which understanding forms and connects its polar concepts. The rise and spread of this kind of thinking Hegel connects with the origin and prevalence of crucial relationships in human life. The antagonisms of 'isolated reflections' express real antagonisms. .... Isolation and opposition are not, however, the final state of affairs. The world must not remain a complex of fixed disparates. The unity that underlies the antagonisms must be grasped and realized by reason, which has the task of reconciling the opposites and 'sublimating' them in a true unity.

Olympian bards who sung Divine ideas below, Which always find us young And always keep us so.

Philosophy is the self-correction by consciousness of its own initial excess of subjectivity. Each actual occasion contributes to the circumstances of its origin additional formative elements deepening its own peculiar individuality. Consciousness is only the last and greatest of such elements by which the selective character of the individual obscures the external totality from which it originates and which it embodies. An actual individual, of such higher grade, has truck with the totality of things by reason of its sheer actuality; but it has attained its individual depth of being by a selective emphasis limited to its own purposes. The task of philosophy is to recover the totality obscured by the selection.

As for us, my little friend, we entered [the Communist Party] because we were tired of dying of hunger.