There are no circumstances imaginable, not even victory, under which the proletariat should give up its possession of arms.

...the very cannibalism of the counterrevolution will convince the nations that there is only one way in which the murderous death agonies of the old society and the bloody birth throes of the new society can be shortened, simplified and concentrated, and that way is revolutionary terror.

The unity of the bourgeoisie can be shaken only by the unity of the proletariat.

The world will be for the common people, and the sounds of Happiness will reach even the deepest springs.

In proportion as the exploitation of one individual by another is put an end to, the exploitation of one nation by another will also be put an end to. In proportion as the antagonism between classes within the nation vanishes, the hostility of one nation to another will come to an end.

Capital is reckless of the health or length of life of the laborer, unless under compulsion from society.

All social life is essentially practical. All mysterious which lead theory to mysticism find their rational solution in human practice and in the comprehension of the practice.