"If it were necessary to give the briefest possible definition of imperialism, we should have to say ..." — Vladimir Lenin

The history of all countries shows that the working class exclusively by its own effort is able to develop only trade-union consciousness.

Without a revolutionary theory there cannot be a revolutionary movement.

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

A revolution is impossible without a revolutionary situation; furthermore, not every revolutionary situation leads to revolution.