"Freeman and slave, patrician and plebeian, lord and serf, guildmaster and journeyman, in a word, oppressor and oppressed, stood in constant opposition to one another, carried on an uninterrupted, now hidden, now open fight,

"All Communists first and foremost, all sympathisers with them, all honest workers and peasants, all Soviet officials must pull themselves together like soldiers and concentrate to the maximum their work

"The only correct, sound and expedient method of removing friction and of settling disputes between individual contingents of the working class and the organs of the workers’ state is for the trade unions to act as mediators

"In short, the Communists everywhere support every revolutionary movement against the existing social and political order of things.
In all these movements, they bring to the front, as the leading question in each, the property question, no matter what its degree of development at the time." - Marx

"Capital does not consist in the fact that accumulated labour serves living labour as a means for new production. It consists in the fact that living labour serves accumulated labour as the means of preserving and multiplying its exchange value." - Marx

"To indulge in irresponsible criticism in private instead of actively putting forward one's suggestions to the organization. To say nothing to people to their faces but to gossip behind their backs, or to say nothing at a meeting but to gossip afterwards.

"It is, of course, much easier to shout, abuse, and howl than to attempt to relate, to explain, to recall what Marx and Engels said in 1871, 1872 and 1875 about the experience of the Paris Commune and about the kind of state the proletariat needs." - Lenin

"The immediate aim of the Communists is the same as that of all other proletarian parties: formation of the proletariat into a class, overthrow of the bourgeois supremacy, conquest of political power by the proletariat." - Marx

"The revolutionary movement "has already brought about the necessity for an armed uprising"—this idea, expressed by the Third Congress of our Party, finds increasing confirmation day after day. The flames of revolution are flaring up with ever-increasing intensity." - Stalin