We are not shooting enough professors.

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.

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.

Truth is the most precious thing. That's why we should ration it.

Capitalists are no more capable of self-sacrifice than a man is capable of lifting himself up by his own bootstraps.

For the complete extinction of the state, complete Communism is necessary.

Without revolutionary theory there can be no revolutionary movement.