The working classes in every country only learn to fight in the course of their struggles...Social democracy...is only the advance guard of the proletariat, a small piece of the total working masses; blood from their blood, and flesh from their flesh. Social democracy seeks and finds the ways, and particular slogans, of the workers' struggle only in the course of the development of this struggle, and gains directions for the way forward through this struggle alone.

The clergy, no less than the capitalist class, lives on the backs of the people, profits from the degradation, the ignorance and the oppression of the people.

Capitalism, as a result of its own inner contradictions, moves toward a point when it will be unbalanced, when it will simply become impossible.

Only to the rude ear of one who is quite indifferent does the song of a bird seem always the same.

The masses are the decisive element, they are the rock on which the final victory of the revolution will be built.

Only through the conscious action of the working masses in city and country can it be brought to life, only through the people's highest intellectual maturity and inexhaustible idealism can it be brought safely through all storms and find its way to port.

Before a revolution happens, it is perceived as impossible; after it happens, it is seen as having been inevitable.