"The only intelligible language in which we converse with one another consists of our objects in their relation to each other. We would not understand a human language and it would remain without effect. By one side it would be recognised and felt as being a request, an entreaty, and therefore a humiliation"

"In place of the old bourgeois society, with its classes and class antagonisms, we shall have an association in which the free development of each is the condition for the free development of all."

"But the revolution is thoroughgoing. It is still traveling through purgatory. It does its work methodically. ... And when it has accomplished this second half of its preliminary work, Europe will leap from its seat and exult: Well burrowed, old mole!"

"The premises from which we begin are not arbitrary ones, not dogmas, but real premises from which abstraction can only be made in the imagination. They are the real individuals, their activity and the material conditions under which they live, both those which they find already existing and those produced by their activity. These premises can thus be verified in a purely empirical way."

"The price or money-form of commodities is, like their form of value generally, a form quite distinct from their palpable bodily form; it is, therefore, a purely ideal or mental form"

"The materialist doctrine concerning the changing of circumstances and upbringing forgets that circumstances are changed by men and that it is essential to educate the educator himself. This doctrine must, therefore, divide society into two parts, one of which is superior to society."

"History does nothing, it ‘possesses no immense wealth’, it ‘wages no battles’. It is man, real, living man who does all that, who possesses and fights; ‘history’ is not, as it were, a person apart, using man as a means to achieve its own aims; history is nothing but the activity of man pursuing his aims.."

"Relations of personal dependence are the first social forms in which human productive capacity develops only to a slight extent and at isolated points. Personal independence founded on objective dependence is the second great form, in which a system of general social metabolism, of universal relations, of all-round needs and universal capacities is formed for the first time."

"Man’s reflections on the forms of social life, and consequently, also, his scientific analysis of those forms, take a course directly opposite to that of their actual historical development. He begins, post festum, with the results of the process of development ready to hand before him."

"The state is based on this contradiction. It is based on the contradiction between public and private life, between universal and particular interests. For this reason, the state must confine itself to formal, negative activities"

"The human being is in the most literal sense a political animal not merely a gregarious animal, but an animal which can individuate itself only in the midst of society. Production by an isolated individual outside society ... is as much of an absurdity as is the development of language without individuals living together and talking to each other."

"And now as to myself, no credit is due to me for discovering the existence of classes in modern society or the struggle between them. Long before me bourgeois historians had described the historical development of this class struggle and bourgeois economists, the economic anatomy of classes. What I did that was new was to prove:"

"As Prometheus, having stolen fire from heaven, begins to build houses and to settle upon the earth, so philosophy, expanded to be the whole world, turns against the world of appearance. The same now with the philosophy of Hegel."

"In the social production of their existence, men inevitably enter into definite relations, which are independent of their will, namely relations of production appropriate to a given stage in the development of their material forces of production. The totality of these relations of production constitutes the economic structure of society, the real foundation, on which arises a legal and political superstructure and to which correspond definite forms of social consciousness."

"The categories of bourgeois economy consist of such like forms. They are forms of thought expressing with social validity the conditions and relations of a definite, historically determined mode of production, viz., the production of commodities. The whole mystery of commodities, all the magic and necromancy that surrounds the products of labour as long as they take the form of commodities, vanishes therefore, so soon as we come to other forms of production."

"In studying such transformations it is always necessary to distinguish between the material transformation of the economic conditions of production, which can be determined with the precision of natural science, and the legal, political, religious, artistic or philosophic – in short, ideological forms in which men become conscious of this conflict and fight it out."

"Everyone who knows anything of history also knows that great social revolutions are impossible without the feminine ferment. Social progress may be measured precisely by the social position of the fair sex (plain ones included)."

"Political Economy regards the proletarian ... like a horse, he must receive enough to enable him to work. It does not consider him, during the time when he is not working, as a human being. It leaves this to criminal law, doctors, religion, statistical tables, politics, and the beadle."

"Capital is money: Capital is commodities. ... Because it is value, it has acquired the occult quality of being able to add value to itself. It brings forth living offspring, or, at the least, lays golden eggs."

"Communism is for us not a state of affairs which is to be established, an ideal to which reality [will] have to adjust itself. We call communism the real movement which abolishes the present state of things. The conditions of this movement result from the premises now in existence."