The state is based on this contradiction. It is based on the contradiction between public and private life, between universal and particular interests. For this reason, the state must confine itself to formal, negative activities.

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.

We should not say that one man's hour is worth another man's hour, but rather that one man during an hour is worth just as much as another man during an hour. Time is everything, man is nothing: he is at the most time's carcass.

Constant labor of one uniform kind destroys the intensity and flow of a man's animal spirits, which find recreation and delight in mere change of activity.

Philosophy is to science as masturbation is to sex.

In my free time I do differential and integral calculus.

History repeats itself, the first as tragedy, then as farce.