Religion is the impotence of the human mind to deal with occurrences it cannot understand.

I am stretching out this volume, since those German dogs estimate the value of books by their cubic contents.

It is not the consciousness of men that determines their being, but, on the contrary, their social being that determines their consciousness.

The method of production of the material things of life generally determines the social, political and spiritual currents of life.

I am a machine, condemned to devour them and then, throw them, in a changed form, on the dunghill of history.

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

A spectre is haunting Europe-the spectre of Communism. All the Powers of old Europe have entered into holy alliance to exorcise this spectre: Pope and Czar, Metternich and Guizot, French Radicals and German police-spies. Where is the Party in opposition that has not been decried as Communistic by its opponents in power? Where the Opposition that has not hurled back the branding reproach of Communism, against the more advanced opposition parties, as well as against its reactionary adversaries?