It is necessary to be able to withstand all this, to agree to any and every sacrifice, and even - if need be - to resort to all sorts of stratagems, manoeuvres and illegal methods, to evasion and subterfuges in order to penetrate the trade unions, to remain in them, and to carry on Communist work in them at all costs.

Without a revolutionary theory there cannot be a revolutionary movement.

The only one who doesn't make mistakes is the one who doesn't do anything.

In the last analysis, productivity of labour is the most important, the principal thing for the victory of the new social system.

Hundreds of thousands and millions of wage slaves of capital and peasants downtrodden by the serf-owners are going to the slaughter for the dynastic interests of a handful of crowned brigands, for the profits of the bourgeoisie in its drive to plunder foreign lands.

It is necessary - secretly and urgently to prepare the terror.

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