To call on them to give up their illusions about their condition is to call on them to give up a condition that requires illusions. The criticism of religion is therefore in embryo the criticism of that vale of tears of which religion is the halo
Nothing can have value without being an object of utility.
The ruling ideas of each age have ever been the ideas of its ruling class.
Revolutions are the locomotives of history.
The production of too many useful things results in too many useless people.
The history of all previous societies has been the history of class struggles.