Without a revolutionary theory there cannot be a revolutionary movement.

There can be nothing more abominable than religion.

If it were necessary to give the briefest possible definition of imperialism, we should have to say that imperialism is the monopoly stage of capitalism.

It would be the greatest mistake, certainly, to think that concessions mean peace. Nothing of the kind. Concessions are nothing but a new form of war.

Only an armed people can be the real bulwark of popular liberty.

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.

Soviet power is a new type of state in which there is no bureacracy, no police, no standing army.