Man is only truly free only among equally free men.

Intellectual slavery, of whatever nature it may be, will always have as a natural result both political and social slavery.

We are materialists and atheists, and we glory in the fact.

Human nature is so constituted that the propensity for evil is always intensified by external circumstances, and the morality of the individual depends much more on the conditions of his existence and the environment in which he lives than on his own will.

I bow before the authority of special men because it is imposed upon me by my own reason.

Those mutually opposed manifestos are written with the same eloquence, they breathe the same virtuous indignation, and one is just as sincere as the other; that is to say both of them are equally brazen in their lies, and it is only fools who are deceived by them. Sensible persons, all those who have had some political experience, do not even take the trouble of reading such manifestos.

The liberty of man consists solely in this, that he obeys the laws of nature because he has himself recognized them as such, and not because they have been imposed upon him externally by any foreign will whatsoever, human or divine, collective or individual.