The Wealth of Nations by Part 2 Chapter 1 Page 21

is in proportion to the extent and proper application of the capitals employed about them. When the capitals are equal and equally well applied, it is in proportion to their natural fertility.

In all countries where there is tolerable security, every man of common understanding will endeavour to employ whatever stock he can command in procuring either present enjoyment or future profit.

If it is employed in procuring present enjoyment, it is a stock reserved for immediate consumption. If it is employed in procuring future profit, it must procure this profit either staying with him, or by going from him. In the one case it is fixed, in the other it is a circulating capital. A man must be perfectly crazy who, where there is tolerable security, does not employ all the stock which he