Every owner of a commodity wishes to part with it in exchange for other commodities, but only those whose use-value satisfies some want of his. To the owner of a commodity, every other commodity is, in regard to his own, a particular equivalent. Consequently his own commodity is the universal equivalent for all others. But, since this applies to every owner, there is, in fact, no commodity acting as a universal equivalent. It was soon seen that a particular commodity would not become the universal equivalent except by a social act. The social action, therefore, has set apart the particular commodity in which all values are represented, and the bodily form of this commodity has become the form of the socially recognised universal equivalent--money. The first chief function of money is to supply commodities with the material for the expression of their values. It thus serves as a universal measure of value, and only by virtue of this function does gold, the commodity _par excellence_, become money. But money itself has no price. As the measure of value and the standard of price, money has two distinct functions to perform. It is the measure of value inasmuch as it is the socially recognised incarnation, of human labour; it is the standard of price inasmuch as it is a fixed weight of metal. As the measure of value it serves to convert the values of all the various commodities into prices or imaginary quantities of gold. As the standard of price it measures those quantities of gold. The word pound was the money-name given to an actual pound weight of silver. When, as a measure of value, gold superseded silver, the word pound became, as a money-name, differentiated from the same word as a weight-name. The prices, or quantities of gold, into which the values of commodities are ideally changed are now expressed in the names of coins, or in the legally valid names of the subdivisions of the gold standard. Hence, instead of saying, "A quarter of wheat is worth an ounce of gold," the English would say, "It is worth £3 17s. 10-1/2d." In this fashion commodities express by their prices how much they are worth, and money serves as _money of account_ whenever it is a question of fixing the value of an article in its money-form. When Anarcharsis was asked for what purpose the Greeks used money, he replied, "For reckoning."