If emancipation of the working classes requires their fraternal conncurrence, how are they to fulfill that great mission with a foreign policy in pursuit of criminal designs, playing upon national prejudices, and squandering in piratical wars the people's blood and treasure? It was not the wisdom of the ruling classes, but the heroic resistance to their criminal folly by the working classes of England, that saved the west of Europe from plunging headlong into an infamous crusade for the propagation of slavery on the other side of the Atlantic.

Religion is the opiate of the people.

Be careful to trust a person who does not like wine.

The history of all previous societies has been the history of class struggles.

Force is the midwife of every old society pregnant with a new one.

If the labourer consumes his disposable time for himself, he robs the capitalist.

Since only what is material is perceptible, knowable, nothing is known of the existence of God.