Religion is the sigh of the oppressed creature, the heart of a heartless world, just as it is the spirit of a spiritless situation. It is the opium of the people.
There is a specter haunting Europe, the specter of Communism.
The philosophers have only interpreted the world, in various ways. The point, however, is to change it.
Capital is dead labor, which, vampire-like, lives only by sucking living labor, and lives the more, the more labor it sucks.
The theory of Communism may be summed up in one sentence: Abolish all private property.
Men make their own history, but they do not make it as they please.
Reason has always existed, but not always in a reasonable form.
The history of all previous societies has been the history of class struggles.
The production of too many useful things results in too many useless people.
If anything is certain, it is that I myself am not a Marxist.