[Geology] opens up such wide intellectual vistas and supplies a more perfectly unified and more comprehensive conception of nature than any other science.

Freedom only for the members of the government, only for the members of the Party - though they are quite numerous - is no freedom at all.

Bourgeois society stands at the crossroads, either transition to socialism or regression into barbarism.

The masses are the decisive element, they are the rock on which the final victory of the revolution will be built.

The most revolutionary act is a clear view of the world as it really is.

The working classes in every country only learn to fight in the course of their struggles.

History is the only true teacher, the revolution the best school for the proletariat.