While coffee, tea, bread, calico, in short, all commodities express in linen the labor-time contained in them, the exchange value of linen, on the other hand, unfolds itself in all other commodities as its equivalents, and the labor-time embodied in it becomes direct universal labor-time, which is equally expressed in different volumes of all other commodities. Linen thus becomes the _universal equivalent_ through the _universal action_ of all other commodities upon it. As exchange value, every commodity served as a measure of value of all other commodities. Now, on the contrary, since all commodities measure their exchange values by means of a particular commodity, this excluded commodity becomes the special expression of exchange value, as a universal equivalent. At the same time, the endless series of equations in which the exchange value of every commodity was expressed, is reduced to one single equation consisting of two members. The equation 2 lbs. of coffee = 1 yard of linen now fully expresses the exchange value of coffee, for in this expression a yard of linen appears as the direct equivalent of a definite quantity of every other commodity. Thus, within the sphere of exchange all commodities are or appear to each other as exchange values in the form of linen. The proposition that commodities, as exchange values, are to each other as different quantities of materialized universal labor-time, may now be worded to the effect that commodities, as exchange values, represent nothing but different quantities of _the same_ article, linen. Universal labor-time thus assumes the aspect of a distinct thing, as a commodity existing along with and outside of all other commodities. At the same time the equation 2 lbs. of coffee = 1 yard of linen, in which one commodity appears as the exchange value of another, is yet to be realized. Only by being alienated as use-value―which depends upon whether it proves to be in the process of exchange the object of a certain want―does the commodity actually transform its existence as coffee into the existence as linen and thus takes on the form of a universal equivalent and becomes, indeed, an exchange value for all other commodities. Conversely, since all commodities are turned into linen by being alienated as use-values, linen becomes the converted form of all other commodities, and only as a result of this transformation of all other commodities into it, it becomes the direct _embodiment of universal labor-time_, i. e., the product of universal exchange and of the elimination of individual labor. If commodities thus assume a twofold character in order to appear as exchange values to each other, the commodity which has been singled out as the universal equivalent becomes, on the other hand, a use-value in two ways. Besides its special use-value as a particular commodity, it assumes a universal use-value. This latter kind of use-value constitutes its special feature, emanating as it does,