Freedom is always the freedom of dissenters.
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.
Only to the rude ear of one who is quite indifferent does the song of a bird seem always the same.
Marxism is a revolutionary worldview that must always struggle for new revelations.
The victory of socialism will not descend like fate from heaven.
History is the only true teacher, the revolution the best school for the proletariat.