The traditions of the dead generations weigh like a nightmare upon the living.

All history is nothing but a continuous transformation of human nature.

The task is not just to understand the world but to change it.

The Communists have no need to introduce free love; it has existed almost from time immemorial.

The product of mental labor - science - always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.

Science and democracy are the right and left hands of what I'll refer to as the move from the realm of necessity to the realm of freedom.

A nation that enslaves another forges its own chains.