"Everyone is free to write and say whatever he likes, without any restrictions. But every voluntary association is also free to expel members who use the name of the party to advocate anti-party views. Freedom of speech and the press must be complete. But then freedom of association must be complete too. I am bound to accord you, in the name of free speech, the full right to shout, lie and write to your heart’s content. But you are bound to grant me, in the name of freedom of association, the right to enter into, or withdraw from, association with people advocating this or that view. The party is a voluntary association, which would inevitably break up, first ideologically and then physically, if it did not cleanse itself of people advocating anti-party views."

“The state is the product and the manifestation of the irreconcilability class antagonisms. The state arises when, where and to the extent that class antagonisms cannot be objectively reconciled. And, conversely, the existence of the state proves that the class antagonisms are irreconcilable.”

“It is not our immediate task to “introduce” socialism, but only to bring social production and the distribution of products at once under the control of the Soviets of Workers’ Deputies.”

“We would be deceiving both ourselves and the people if we concealed from the masses the necessity of a desperate, bloody war of extermination, as the immediate task of the coming revolutionary action.”

“One may become a demagogue out of sheer political innocence.”

“Rectilinearity and one-sidedness, woodenness and petrification, subjectivism and subjective blindness — voilà the epistemological roots of idealism.”

“The proletariat needs state power, a centralized organisation of force, an organisation of violence, both to crush the resistance of the exploiters and to lead the enormous mass of the population - the peasants, the petty bourgeoisie, and semi-proletarians - in the work of organising a socialist economy.”