The whole struggle of our Party (and of the working class movement in Europe generally) must be directed against opportunism. The latter is not a current of opinion, not a tendency; it (opportunism) has now become the organised tool of the bourgeoisie within the working class movement.

The suppression of the bourgeois state by the proletarian state is impossible without violent revolution.

The soundest strategy in war is to postpone operations until the moral disintegration of the enemy renders the delivery of the mortal blow both possible and easy.

Freedom in capitalist society always remains about the same as it was in ancient Greek republics: Freedom for slave owners.

Unity must be won, and only the workers, the class-conscious workers themselves can win it - by stubborn and persistent effort.

The goal of socialism is communism.

Authority poisons everybody who takes authority on himself.