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.Karl Marx
In bourgeois society capital is independent and has individuality, while the living person is dependent and has no individuality.Karl Marx
In a higher phase of communist society... only then can the narrow horizon of bourgeois right be fully left behind and society inscribe on its banners: from each according to his ability, to each according to his needs.Karl Marx
The development of civilization and industry in general has always shown itself so active in the destruction of forests that everything that has been done for their conservation and production is completely insignificant in comparison.Karl Marx
Capital is dead labor, which, vampire-like, lives only by sucking living labor, and lives the more, the more labor it sucks.Karl Marx
Machines were, it may be said, the weapon employed by the capitalists to quell the revolt of specialized labor.Karl Marx