"Without a revolutionary theory there can be no revolutionary movement. This cannot be insisted upon too strongly at a time when the fashionable preaching of opportunism is combined with absorption in the narrowest forms of practical activity."

“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.”