History is the only true teacher, the revolution the best school for the proletariat.

People finally understood that the role of the social-democratic party rests on its conscious leadership of the mass struggle against the existing society, a struggle that must reckon with the vital, necessary conditions of capitalist society.

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.

People finally understood that the role of the social-democratic party rests on its conscious leadership of the mass struggle against the existing society, a struggle that must reckon with the vital, necessary conditions of capitalist society.

The existing legal constitution is nothing but the product of a revolution. Revolution is the act of political creation in the history of classes, while constitutional legislation is the expression of the continual political vegetation of a society.

Freedom is always and exclusively freedom for the one who thinks differently.

Freedom only for the members of the government, only for the members of the Party - though they are quite numerous - is no freedom at all.