Karl Marx. Capital Volume One The change of value that occurs in
the case of money intended to be converted into capital, cannot
take place in the money itself, since in its function of means
of purchase and of payment, it does no more than realise the
price of the commodity it buys or pays for; and, as hard cash,
it is value petrified, never varying.  Just as little can it
originate in the second act of circulation, the re-sale of the
commodity, which does no more than transform the article from
its bodily form back again into its money-form. The change must,
therefore, take place in the commodity bought by the first act,
M-C, but not in its value, for equivalents are exchanged, and
the commodity is paid for at its full value. We are, therefore,
forced to the conclusion that the change originates in the use-
value, as such, of the commodity, i.e., in its consumption. In
order to be able to extract value from the consumption of a
commodity, our friend, Moneybags, must be so lucky as to find,
within the sphere