Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people.
Only in community with others has each individual the means of cultivating his gifts in all directions; only in the community, therefore, is personal freedom possible.
Necessity is blind until it becomes conscious. Freedom is the consciousness of necessity.
Religion is the impotence of the human mind to deal with occurrences it cannot understand.
The production of too many useful things results in too many useless people.
I am a machine condemned to devour books.
Go on, get out! Last words are for fools who haven't said enough!
The human being is in the most literal sense a political animal, not merely a gregarious animal, but an animal which can individuate itself only in the midst of society.
Natural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science.
History does nothing it does not possess immense riches, it does not fight battles. It is men, real, living, who do all this.
All I know is I'm not a Marxist.
Men make their own history, but they do not make it as they please.
Capitalist production, therefore, develops technology, and the combining together of various processes into a social whole, only by sapping the original sources of all wealth - the soil and the labour...
Greek philosophy seems to have met with something with which a good tragedy is not supposed to meet, namely, a dull ending.
Experience praises the most happy the one who made the most people happy.
All that philosophers have done is interpret the world in different ways. It is our job to change it.
It is not history which uses men as a means of achieving - as if it were an individual person - its own ends. History is nothing but the activity of men in pursuit of their ends.
It is absolutely impossible to transcend the laws of nature. What can change in historically different circumstances is only the form in which these laws expose themselves.
Let the ruling classes tremble at a Communist revolution. The proletarians have nothing to lose but their chains. They have a world to win. Working men of all countries unite!
Ignorance never yet helped anybody.