Communism is the riddle of history solved, and it knows itself to be this solution.

Surplus-value and the rate of surplus-value are... the invisible essence to be investigated, whereas the rate of profit and hence the form of surplus-value as profit are visible surface phenomena

The fact that labour is external to the worker, i.e., it does not belong to his intrinsic nature; that in his work, therefore he does not affirm himself but denies himself, does not feel content but unhappy, does not develop freely his physical and mental energy but mortifies his body and his mind. The worker therefore only feels himself outside his work, and in his work feels outside himself.

Keep people from their history, and they are easily controlled.

Let us consider the actual, worldly Jew - not the Sabbath Jew, as Bauer does, but the everyday Jew. ... What is the worldly religion of the Jew? Huckstering. What is his worldly God? Money. Money is the jealous god of Israel, in face of which no other god may exist. Money degrades all the gods of man - and turns them into commodities. The bill of exchange is the real god of the Jew. His god is only an illusory bill of exchange. The chimerical nationality of the Jew is the nationality of the merchant, of the man of money in general.

The more a ruling class is able to assimilate the most prominent men of a ruled class, the more solid and dangerous its rule.

Philosophy stands in the same relation to the study of the actual world as masturbation to sexual love.