Misery motivates, not utopia.

The philosophers have only interpreted the world, in various ways: the point, however, is to change it.

Be aware that the reward for labour, and quantity of labour, are quite disparate things.

What the bourgeoisie therefore produces, above all, are its own grave-diggers. Its fall and the victory of the proletariat are equally inevitable.

We know that violent measures against religion are nonsense; but this is an opinion: as socialism grows, religion will disappear. Its disappearance must be done by social development, in which education must play a part.

The ideas of the ruling class are in every epoch the ruling ideas, i.e., the class which is the ruling material force of society, is at the same time its ruling intellectual force.

History repeats itself, the first as tragedy, then as farce.