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. [In a letter about the peculiar ‘Marxism’ which arose in France 1882]
The rich will do anything for the poor but get off their backs.
Religion is the opium of the masses.
The only antidote to mental suffering is physical pain.
Society does not consist of individuals but expresses the sum of interrelations, the relations within which these individuals stand.
In bourgeois society capital is independent and has individuality, while the living person is dependent and has no individuality.
From each according to his abilities, to each according to his needs.
While the miser is merely a capitalist gone mad, the capitalist is a rational miser.
History repeats itself, first as tragedy, second as farce.
Last words are for fools who haven’t said enough.
Revolutions are the locomotives of history.
Nothing can have value without being an object of utility.