Tomorrow the revolution will already 'raise itself with a rattle' and announce with fanfare, to your terror: I was, I am, I will be!

Life is singing also in the sand crunching under the slow and heavy steps of the guards, when we know how to listen to it.

[Geology] opens up such wide intellectual vistas and supplies a more perfectly unified and more comprehensive conception of nature than any other science.

The working classes in every country only learn to fight in the course of their struggles.

Only to the rude ear of one who is quite indifferent does the song of a bird seem always the same.

The victory of socialism will not descend like fate from heaven.

Without general elections, without freedom of the press, freedom of speech, freedom of assembly, without the free battle of opinions, life in every public institution withers away, becomes a caricature of itself, and bureaucracy rises as the only deciding factor.