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

There is no democracy without socialism, and no socialism without democracy.

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.

Marxism must abhor nothing so much as the possibility that it becomes congealed in its current form. It is at its best when butting heads in self-criticism, and in historical thunder and lightning, it retains its strength.

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

The most revolutionary act is a clear view of the world as it really is.

Those who do not move, do not notice their chains.