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

Bourgeois society ought long ago to have gone to the dogs through sheer idleness; for those of its members who work, acquire nothing, and those who acquire anything, do not work.

In this sense, the theory of the Communists may be summed up in the single sentence: Abolition of private property. - Manifesto of the Communist Party

An object of art creates a public capable of finding pleasure in its beauty. Production, therefore, not only produces an object for the subject, but also a subject for the object.

The Communists have no need to introduce free love; it has existed almost from time immemorial.

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)

This young lady, who instantly overwhelmed me with her kindness, is the ugliest creature I have seen in my entire life, with repulsive Jewish facial features.