[(1) The exchange of labour against capital]

In the exchange between the worker and the capitalist the former obtains money and the latter a commodity—a use value—whose price is equal to the money exchanged for it; from the worker (the seller)’s perspective, what the buyer in the exchange does with what she buys has no bearing on the economic relationship.

More (pdf, 102 KB): The Chapter on Capital Part 6: The Exchange of Capital with Labour (pp. 281-304)