Philip Wicksteed quotes
If there is some article of very generally recognised value which actually takes its place, as directly significant, on the scales of a great number of people, it may come to be generally accepted, without any special calculation or consideration, by people who are not thinking of any use they may have for it themselves, but are aware that it occupies a sufficiently high relative place on the scales of others to recoup them for what they give in exchange for it. As soon as this custom begins to be well established it will automatically extend and confirm itself, and the commodity in question will become a "currency" or "medium of exchange," the special characteristic of a medium of exchange being that it is accepted by a man who does not want it, or does not want it as much as what he gives for it, in order that he may exchange it for something he wants more.
Philip Wicksteed
Now the leap by which this reasoning lands us in labour as the sole constituent element of value appears to me so surprising that I am prepared to learn that the yet unpublished portions of Das Kapital contain supplementary or elucidatory matter which may set it in a new light. Meanwhile the analysis appears to be given as complete and adequate, so far as it goes, and I can, therefore, only take it as I find it and try to test its validity. But instead of directly confronting it with what seems to be the true analysis of the phenomenon of exchange, I will follow it out a little further, and we shall see that Marx himself introduces a modification into his result (or develops a half-latent implication in it), in such a way as to vitiate the very analysis on which that result is founded, and to lead us, if we work it out, to what I regard as the true solution of the problem.
Philip Wicksteed