"These extreme left-wing intellectuals have nothing to do with the worker’s movement. Rather they exist as the mirror image of that fringe of bourgeois decadence which tried to assimilate itself to feudal strata and admired the Empire in the person of the reserve lieutenant. … Their function, seen from a political point of view, is to form not a Party, but a clique, seen from a literary point of view, not a school but a fad, from an economic point of view not to become producers but agents. Agents or hacks, who make a great show of their poverty and congratulate themselves on the yawning void. It would be impossible to carve a more comfortable position out of an uncomfortable situation."
"Sociologists who have stopped the time-machine and, with a good deal of conceptual huffing and puffing, have gone down to the engine room to look, tell us that nowhere at all have they been able to locate and classify a class. They can only find a multitude of people with different occupations, incomes, status-hierarchies, and the rest. Of course they are right, since class is not this or that part of the machine, but the way the machine works once it is set in motion – not this and that interest, but the friction of interests – the movement itself, the heat, the thundering noise. Class is a social and cultural formation (often finding institutional expression) which cannot be defined abstractly, or in isolation, but only in terms of relationship with other classes; and, ultimately, the definition can only be made in the medium of time - that is, action and reaction, change and conflict.When we speak of a class we are thinking of a very loosely defined body of people who share the same congeries of interests, social experiences, traditions and value-system, who have a disposition to behave as a class, to define themselves in their actions and in their consciousness in relation to other groups of people in class ways. But class itself is not a thing, it is a happening."
— E.P. Thompson
The reform of consciousness consists only in making the world aware of its own consciousness, in awakening it out of its dream about itself, in explaining to it the meaning of its own actions. Our whole object can only be – as is also the case in Feuerbach’s criticism of religion – to give religious and philosophical questions the form corresponding to man who has become conscious of himself.
Hence, our motto must be: reform of consciousness not through dogmas, but by analysing the mystical consciousness that is unintelligible to itself, whether it manifests itself in a religious or a political form. It will then become evident that the world has long dreamed of possessing something of which it has only to be conscious in order to possess it in reality. It will become evident that it is not a question of drawing a great mental dividing line between past and future, but of realising the thoughts of the past. Lastly, it will become evident that mankind is not beginning a new work, but is consciously carrying into effect its old work.
— Marx - letter to Arnold Ruge, September 1843