Adam Smith. An inquiry into the nature and causes of the wealth of Nations (№ 347135)

Money is the great wheel of circulation. this is the great instrument of exchange and trade, although it is on a par with other instruments of production part, and a very valuable part, of the capital, which are not included in any part of the income of the society to which they belong. Although the coins of which they consist, in the course of their annual circulation is delivered to each person to follow him profit, they are in this income are not included.