Men are born ignorant, not stupid. They are made stupid by education.

Every great idea starts out as a blasphemy.

We know what we are, but know not what we may be.

Sweet are the uses of adversity which, like the toad, ugly and venomous, wears yet a precious jewel in his head.

The production of too many useful things results in too many useless people.

Religion is the opium of the masses.

The history of all hitherto existing societies is the history of class struggles.

The bourgeoisie cannot exist without constantly revolutionising the instruments of production, and thereby the relations of production, and with them the whole relations of society.

Overcoming poverty is not a task of charity, it is an act of justice.

The brave man is not he who does not feel afraid, but he who conquers that fear.