Exchangeable Quotes
It is to labour... and to labour only, that man owes every thing possessed of exchangeable value. Labour is the talisman that has raised him from the condition of the savage - that has changed the desert and the forest into cultivated fields... Labour tho that has covered the earth with cities and the ocean with ships - of wealth that has given us plenty, comfort, and elegance, instead of want, misery, and barbarism.
John Ramsay McCulloch
Marx is, therefore, wrong in saying that when we pass from that in which the exchangeable wares differ (value in use) to that in which they are identical (value in exchange), we must put their utility out of consideration, leaving only jellies of abstract labour. What we really have to do is to put out of consideration the concrete and specific qualitative utilities in which they differ, leaving only the abstract and general quantitative utility in which they are identical.
Philip Wicksteed