Page "Late capitalism" Paragraph 13

Marx presents the process of commodity production as a unity of TWO distinct process -- the labour process through which labour-power produces use-values, and the valorization process through which labour-power produces additional value over and above its own value.

This surplus-value, although created during the process of production, has first to be realized through the sale of commodities before capital can appropriate it and therewith actually increase its own value.