Wages are determined by the bitter struggle between capitalist and worker.

Once the inner connection is grasped, all theoretical belief in the permanent necessity of existing conditions collapses before their collapse in practice -- Letter to Ludwig Kugelmann (July 11, 1868)

We have no compassion and we ask no compassion from you. When our turn comes, we shall not make excuses for the terror.

Go on, get out - last words are for fools who haven't said enough. To his housekeeper, who urged him to tell her his last words so she could write them down for posterity.

Take away a nation's heritage and they are more easily persuaded.

The alienation of man thus appeared as the fundamental evil of capitalist society.

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.