„The labour-power is a commodity, not capital, in the hands of the labourer, and it constitutes for him a revenue so long as he can continuously repeat its sale; it functions as capital after its sale, in the hands of the capitalist, during the process of production itself.“
— Karl Marx German philosopher, economist, sociologist, journalist and revolutionary socialist 1818 - 1883
Vol. II, Ch. XIX, p. 384.
(Buch II) (1893)