The way people get their living determines their social outlook.

What the bourgeoisie therefore produces, above all, are its own grave-diggers. Its fall and the victory of the proletariat are equally inevitable.

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

The product of mental labor - science - always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.

The ruling ideas of each age have ever been the ideas of its ruling class.

The state is the executive committee of the ruling class.

Art is always and everywhere the secret confession, and at the same time the immortal movement of its time.