It is more pleasant and useful to go through the 'experience of the revolution' than to write about it.

Be as radical as Reality.

The whole struggle of our Party (and of the working class movement in Europe generally) must be directed against opportunism. The latter is not a current of opinion, not a tendency; it (opportunism) has now become the organised tool of the bourgeoisie within the working class movement.

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

Russians are too kind, they lack the ability to apply determined methods of revolutionary terror.

Lenin, the greatest man of action in our century and at the same time the most selfless.

Communism is Soviet power plus the electrification of the whole country.