There is only one effective antidote for mental suffering and that is physical pain.

In proportion therefore, as the repulsiveness of the work increases, the wage decreases.

All our inventions have endowed material forces with intellectual life, and degraded human life into a material force.

In the national struggles of the proletarians of the different countries, they point out and bring to the front the common interest of the entire proletariat, independently of all nationality.

Political economy regards the proletarian like a horse, he must receive enough to enable him to work. It does not consider him, during the time when he is not working, as a human being. It leaves this to criminal law, doctors, religion, statistical tables, politics, and the beadle.

To be radical is to grasp things by the root.

The social principles of Christianity preach cowardice, self-contempt, abasement, submission, humility, in a word all the qualities of the canaille