In my free time I do differential and integral calculus.

Under private property, each tries to establish over the other an alien power, so as thereby to find satisfaction of his own selfish need. The increase in the quantity of objects is therefore accompanied by an extension of the realm of the alien powers to which man is subjected, and every new product represents a new potentiality of mutual swindling and mutual plundering.

The criticism of Religion is the beginning of all criticism

From the outset, the Christian was the theorizing Jew, the Jew is therefore the practical Christian, and the practical Christian has become a Jew again.

The bureaucracy is a circle from which no one can escape. Its hierarchy is a hierarchy of knowledge.

You are horrified at our intending to do away with private property. But in your existing society, private property is already done away with for nine tenths of the population; its existence for the few is solely due to its non-existence in the hands of those nine tenths. You reproach us, therefore, with intending to do away with a form of property, the necessary condition for whose existence is the non-existence of any property for the immense majority of society.

Without the presence of class warfare, trade unions would be hard put to justfy their existence.