Just as the savage must wrestle with nature to satisfy his wants, to maintain and reproduce life, so must civilised man, and he must do so in all social formations and under all possible modes of production.

The first requisite for the happiness of the people is the abolition of religion.

Labour is ... not the only source of material wealth, i.e, of the use-values it produces. As William Petty says, Labour is the father of material wealth, the earth is its mother.

The working class is revolutionary or it is nothing.

Hegel remarks somewhere that all great, world-historical facts and personages occur, as it were, twice. He has forgotten to add: the first time as tragedy, the second as farce.

Every emancipation is a restoration of the human world and of human relationships to a man himself.

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