The only hope of socialism resides in those who have already brought about in themselves, as far as is possible in the society of today, that union between manual and intellectual labor which characterizes the society we are aiming at.

Religion as a source of consolation is an obstacle to true faith.

One could count on one's fingers the number of scientists throughout the world with a general idea of the history and development of their particular science: there is none who is really competent as regards sciences other than his own. As science forms an indivisible whole, one may say that there are no longer, strictly speaking, scientists, but only drudges doing scientific work.

Our science is like a store filled with the most subtle intellectual devices for solving the most complex problems, and yet we are almost incapable of applying the elementary principles of rational thought.

The villagers seldom leave the village; many scientists have limited and poorly cultivated minds apart from their specialty.

I would suggest that barbarism be considered as a permanent and universal human characteristic which becomes more or less pronounced according to the play of circumstances.

Contradiction itself, far from always being a criterion of error, is sometimes a sign of truth.