Unity is a great thing and a great slogan. But what the workers’ cause needs is the unity of Marxists, not unity between Marxists, and opponents and distorters of Marxism.

The aim of socialism is not only to abolish the present division of mankind into smaller states and all-national isolation, not only to bring the nations closer to each other, but also to merge them.

Crime is a product of social excess.

Honesty in politics is the result of strength; hypocrisy is the result of weakness.

Attention, must be devoted principally to raising the workers to the level of revolutionaries; it is not our task to descend to the level of the 'working masses'.

Revolution can never be forecast; it cannot be foretold; it comes of itself. Revolution is brewing and is bound to flare up.

To decide once every few years which members of the ruling class is to repress and crush the people through parliament-this is the real essence of bourgeois parliamentarism, not only in parliamentary- constitutional monarchies, but also in the most democratic republics.