History has proved us, and all who thought like us, wrong. It has made it clear that the state of economic development on the Continent at that time was not, by a long way, ripe for the removal of capitalist production.

It is no longer a question anywhere of inventing interconnections from out of our brains, but of discovering them in the facts.

How is it possible that the poorer classes can remain healthy and have a reasonable expectation of life under such conditions? What can one expect but that they should suffer from continual outbreaks of epidemics and an excessively low expectation of life? The physical condition of the workers shows a progressive deterioration.

Lassalle. It would be a pity about the fellow because of his great ability, but these goings-on are really too bad. He was always a man one had to keep a devilish sharp eye on and as a real Jew from the Slav border was always to exploit anyone for his own private ends on party pretexts. And then his urge to push his way into polite society, de parvenir, if only for appearance's sake, to disguise the greasy Breslau Jew with all kinds of pomade and paint was always repulsive.

The irony of world history turns everything upside down. We, the "revolutionaries," the "rebels"-we are thriving far better on legal methods than on illegal methods and revolt. The parties of order, as they call themselves, are perishing under the legal conditions created by themselves. They cry despairingly with Odilon Barrot: la légalité notes tue, legality is the death of us; whereas we, under this legality, get firm muscles and rosy cheeks and look like eternal life.

By bourgeoisie is meant the class of modern capitalists, owners of the means of social production and employers of wage labor. By proletariat, the class of modern wage laborers who, having no means of production of their own, are reduced to selling their labor power in order to live.

The bourgeoisie is charitable out of self-interest; it gives nothing outright, but regards its gifts as a business matter, makes a bargain with the poor, saying: "If I spend this much upon benevolent institutions, I thereby purchase the right not to be troubled any further, and you are bound thereby to stay in your dusky holes and not to irritate my tender nerves by exposing your misery. You shall despair as before, but you shall despair unseen."

What do you say to the elections in the factory districts? Once again the proletariat has discredited itself terribly... [I]t cannot be denied that the increase of working-class voters has brought the Tories more than their mere additional percentage and has improved their relative position.

I forsook the company and the dinner-parties, the port-wine and champagne of the middle-classes, and devoted my leisure-hours almost exclusively to the intercourse with plain working men; I am both glad and proud of having done so. Glad, because thus I was induced to spend many a happy hour in obtaining a knowledge of the realities of life-many an hour, which else would have been wasted in fashionable talk and tiresome etiquette; proud, because thus I got an opportunity of doing justice to an oppressed and calumniated class of men who with all their faults and under all the disadvantages of their situation, yet command the respect of every one but an English money-monger.

How do you think the transition from the present situation to community of Property is to be effected? The first, fundamental condition for the introduction of community of property is the political liberation of the proletariat through a democratic constitution.

Just as Marx used to say about the French Marxists of the late 'seventies: All I know is that I am not a Marxist.

Ireland still remains the Holy Isle whose aspirations must on no account be mixed with the profane class-struggles of the rest of the sinful world ... the Irish peasant must not on any account know that the Socialist workers are his sole allies in Europe.

The bourgeoisie has gained a monopoly of all means of existence in the broadest sense of the word. What the proletarian needs, he can obtain only from this bourgeoisie, which is protected in its monopoly by the power of the state. The proletarian is, therefore, in law and in fact, the slave of the bourgeoisie, which can decree his life or death.

For the first time in the revolutionary movement of 1848, for the first time since 1793, a nation surrounded by superior counter-revolutionary forces dares to counter the cowardly counter-revolutionary fury by revolutionary passion, the terreur blanche by the terreur rouge. For the first time after a long period we meet with a truly revolutionary figure, a man who in the name of his people dares to accept the challenge of a desperate struggle, who for his nation is Danton and Carnot in one person - Lajos Kossuth.

What each individual wills is obstructed by everyone else, and what emerges is something that no one willed.

Labour is the source of all wealth, the political economists assert. And it really is the source -- next to nature, which supplies it with the material that it converts into wealth. But it is even infinitely more than this. It is the prime basic condition for all human existence, and this to such an extent that, in a sense, we have to say that labour created man himself.

The bourgeoisie ... lets him have the appearance of acting from a free choice, of making a contract with free, unconstrained consent, as a responsible agent who has attained his majority. Fine freedom, where the proletarian has no other choice than that of either accepting the conditions which the bourgeoisie offers him, or of starving, of freezing to death, of sleeping naked among the beasts of the forests!

There was a loud echo of Hume in Mach's work, as both emphasized the tangibility of all knowledge-ultimately, all knowledge is based in the senses. Mach also emphasized the internal nature of all knowledge, in that it is experienced in the mind. Finally, he emphasized the importance of quantitative and mathematical methods and models to understand sensory experience.

Nature consists of the elements given by the senses. Primitive man first takes out of them certain complexes of these elements that present themselves with a certain stability and are most important to him. The first and oldest words are names for "things". ... The sensations are no "symbols of things". On the contrary the "thing" is a mental symbol for a sensation-complex of relative stability. Not the things, the bodies, but colours, sounds, pressures, times (what we usually call sensations) are the true elements of the world.

In the philosophy of Mach a world without matter is unthinkable. Matter in Mach's philosophy is not merely required as a test body to display properties of something already there ...it is an essential feature in causing those properties which it able to display, Inertia, for example, would not appear by the insertion of one test body in the world; in some way the presence of other matter is a necessary condition. It will be seen how welcome to such a philosophy is the theory that space and the inertial frame come into being with matter, and grow as it grows.

The mental operation by which one achieves new concepts and which one denotes generally by the inadequate name of induction is not a simple but rather a very complicated process. Above all, it is not a logical process although such processes can be inserted as intermediary and auxiliary links. The principle effort that leads to the discovery of new knowledge is due to abstraction and imagination.

I know of nothing more terrible than the poor creatures who have learned too much. Instead of the sound powerful judgement which would probably have grown up if they had learned nothing, their thoughts creep timidly and hypnotically after words, principles and formulae, constantly by the same paths. What they have acquired is a spider's web of thoughts too weak to furnish sure supports, but complicated enough to provide confusion.

:...Vienna is the origin of so many schools of its own which were dominant in the 1920s. And one of the most fundamental and influential, in which we all were partially caught, was logical positivism. In fact, Mises' brother, Richard von Mises, became one of the leading figures. Now he and I all grew up in this Ernst Mach philosophy that ultimately everything must be rationally justified...

The student of mathematics often finds it hard to throw off the uncomfortable feeling that his science, in the person of his pencil, surpasses him in intelligence,-an impression which the great Euler confessed he often could not get rid of. This feeling finds a sort of justification when we reflect that the majority of the ideas we deal with were conceived by others, often centuries ago. In a great measure it is really the intelligence of other people that confronts us in science.

Personally, people know themselves very poorly.

Scientists believe there is a hierarchy of facts and that among them may be made a judicious choice. They are right, since otherwise there would be no science... One need only open the eyes to see that the conquests of industry which have enriched so many practical men would never have seen the light, if these practical men alone had existed and if they had not been preceded by unselfish devotees who died poor, who never thought of utility, and yet had a guide far other than caprice.As Mach says, these devotees have spared their successors the trouble of thinking.

The aim of research is the discovery of the equations which subsist between the elements of phenomena.

In reality, the law always contains less than the fact itself, because it does not reproduce the fact as a whole but only in that aspect of it which is important for us, the rest being intentionally or from necessity omitted.

Mathematical and physiological researches have shown that the space of experience is simply an actual case of many conceivable cases, about whose peculiar properties experience alone can instruct us.

There is no problem in all mathematics that cannot be solved by direct counting. But with the present implements of mathematics many operations can be performed in a few minutes which without mathematical methods would take a lifetime.

Some Machians were sufficiently impressed by Einstein's interpretations of Brownian movement to accept atomism. Mach himself brushed such objections aside, and also emphatically rejected Einstein's relativity theory.

Not bodies produce sensations, but element-complexes (sensation-complexes) constitute the bodies. When the physicist considers the bodies as the permanent reality, the `elements' as the transient appearance, he does not realise that all `bodies' are only mental symbols for element-complexes (sensation-complexes)

To be or not to be is not the question where transcendence is concerned. The statement of being's other, of the otherwise than being, claims to state a difference over and beyond that which separates being from nothingness - the very difference of the beyond, the difference of transcendence.

The transition of the subject-object relation to that of the I-Thou implies a passage of consciousness to a new sphere of existence, viz, the interval, betweenness or Zwischen; and this is a passage from thought to Umfassung.

When ethics thus moves into the domain of politics and becomes morality, the possibility of violence appears because of the threat of the application of such absolutist forms of thought. Further, although the moral agent must remain free in order to avoid the totalizing domination of the state, morality must still be grounded in the ethical relation of the face-to-face.

Fear for the Other, fear for the other man's death is my fear, but is in no way an individual's taking fright.

The detour to ideality leads to coinciding with oneself, that is, to certainty, which remains the guide and guarantee of the whole spiritual adventure of being.

To ignore the true God is in fact only half an evil; atheism is worth more than the piety bestowed on mythical gods.

The mores I return to myself, the more I divest myself, under the traumatic effect of persecution , of my freedom as a constituted, wilful, imperialistic subject, the more I discover myself to be responsible' the more just I am, the more guilty I am. I am 'in myself' through others.

The moral consciousness can sustain the mocking gaze of the political man only if the certitude of peace dominates the evidence of war. Such a certitude is not obtained by a simple play of antitheses. The peace of empires issued from war rests on war. It does not restore to the alienated beings their lost identity. For that a primordial and original relation with being is needed.

The ego involved in responsibility is me and no one else, me with whom one whould have liked to pair up a sister soul, from whom one would have substitution and sacrifice.

The comprehension of God taken as a participation in his sacred life, an allegedly direct comprehension, is impossible, because participation is a denial of the divine, and because nothing is more direct than the face to face, which is straightforwardness itself.

The theory of transparency was set up in reaction to the theory of mental images, of an inner tableu which the perception of an object would leave in us. In imagination our gaze always goes outward, but imagination modifies and neutralizes the gaze: the real world appears in it as it were between parenthesis or quote marks.

By asserting the objectivity of the physical world, naturalism identifies the existence and the conditions of existence of the physical world with existence and the conditions of existence in general. It forgets that the world of the physicist necessarily refers back, through its intrinsic meaning, through the subjective world which one tries to exclude from reality as being pure appearance, conditioned by the empirical nature of man, which is incapable of reaching directly to a world of things in themselves. But while the world of the physicist claims to go beyond naive experience, his world really exists only in relation to naive experience.

If every pure character in the Old Testament announces the Messiah, if every unworthy person is his torturer and every woman his Mother, does not the Book of Books lose all life with this obsessive theme? On the doctrine of prefiguration.

What an incitation to hilarity, hearing the word goal while following a funeral procession!

With success and a literary career one becomes an unquestioning part of the mechanism, whereas the only truly important years are those in which one is unknown.

The surest means of not losing your mind on the spot: remembering that everything is unreal, and will remain so...

To have grazed every form of failure, including success.

There exists, I grant you, a clinical depression, upon which certain remedies occasionally have effect; but there exists another kind, a melancholy underlying our very outbursts of gaiety and accompanying us everywhere, without leaving us alone for a single moment. And there is nothing that can rid us of this lethal omnipresence: the self forever confronting itself.