"Religion is the opium of the people."

"The commodity is a mysterious thing, simply because in it the social character of men's labour appears to them as an objective character stamped upon the product of that labour."

"The worker is the owner of his labour power, but he cannot sell it without selling himself."

"The product of mental labour – science – always stands far below its value, because the labour-time necessary to reproduce it has no relation at all to the labour-time required for its original produc…"

"The development of a class society is based on the exploitation of the majority by the minority."