There is no democracy without socialism, and no socialism without democracy.

Freedom is always and exclusively freedom for the one who thinks differently.

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

Freedom only for supporters of the government, only for the members of one party - however numerous they may be - is no freedom at all. Freedom is always and exclusively freedom for the one who thinks differently. Not because of any fanatical concept of 'justice' but because all that is instructive, wholesome and purifying in political freedom depends on this essential characteristic, and its effectiveness vanishes when 'freedom' becomes a special privilege.

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.

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

Marxism is a revolutionary worldview that must always struggle for new revelations.