s that which
is not a direct help to nature, as money, but is invented by the art
of man, for the convenience of exchange, and as a measure of things
salable.

Now it is evident that man's happiness cannot consist in natural
wealth. For wealth of this kind is sought for the sake of something
else, viz. as a support of human nature: consequently it cannot be
man's last end, rather is it ordained to man as to its end. Wherefore
in the order of nature, all such things are below man, and made for
him, according to Ps. 8:8: "Thou hast subjected all things under his
feet."

And as to artificial wealth, it is not sought save for the sake of
natural wealth; since man would not seek it except because, by its
means, he procures for himself the necessaries of life. Consequently
much less can it be considered in the light of the last end. Therefore
it is impossible for happiness, which is the last end of man, to
consist in wealth.

Reply Obj. 1: All material things obey money, so far as the
multitude of fools is concerned, who know no other than material
goods, which can be obtained for money. But we should take our
estimation of human goods not from the foolish but from the wise: just
as it is for a person whose sense of taste is in good order, to judge
whether a thing is palatable.

Reply Obj. 2: All things salable can be had for money: not so
spiritual things, which cannot be sold. Hence it is written (Prov.
17:16): "What doth it avail a fool to have riches, seeing he cannot
buy wisdom."

Reply Obj. 3: The desire for natural riches is not infinite:
because they suffice for nature in a certain measure. But the desire
for artificial wealth is infinite, for it is the servant of disordered
concupiscence, which is not curbed, as the Philosopher makes clear
(Polit. i, 3). Yet this desire for wealth is infinite otherwise than
the desire for the sovereign good. For the more perfectly the
sovereign good is possessed, the more it is loved, and other things
despised: because the more we possess it, the more we know it. Hence
it is written (Ecclus. 24:29): "They that eat me shall yet hunger."
Whereas in the desire for wealth and for whatsoever temporal goods,
the contrary is the case: for when we already possess them, we despise
them, and seek others: which is the sense of Our Lord's words (John
4:13): "Whosoever drinketh of this water," by which temporal goods are
signified, "shall thirst again." The reason of this is that we reali