ts may rightly fulfil their
functions. For, in proportion as the body is capable of being
affected in a greater variety of ways, and of affecting external
bodies in a great number of ways, so much the more is the mind
capable of thinking (IV. xxxviii., xxxix.). But there seem to be
very few things of this kind in nature; wherefore for the due
nourishment of the body we must use many foods of diverse nature.
For the human body is composed of very many parts of different
nature, which stand in continual need of varied nourishment, so
that the whole body may be equally capable of doing everything
that can follow from its own nature, and consequently that the
mind also may be equally capable of forming many perceptions.

XXVIII. Now for providing these nourishments the strength of
each individual would hardly suffice, if men did not lend one
another mutual aid. But money has furnished us with a token for
everything: hence it is with the notion of money, that the mind
of the multitude is chiefly engrossed: nay, it can hardly
conceive any kind of pleasure, which is not accompanied with the
idea of money as cause.

XXIX. This result is the fault only of those, who seek
money, not from poverty or to supply their necessary wants, but
because they have learned the arts of gain, wherewith they bring
themselves to great splendour. Certainly they nourish their
bodies, according to custom, but scantily, believing that they
lose as much of their wealth as they spend on the preservation of
their body. But they who know the true use of money, and who fix
the measure of wealth solely with regard to their actual needs,
live content with little.

XXX. As, therefore, those things are good which assist the
various parts of the body, and enable them to perform their
functions; and as pleasure consists in an increase of, or aid
to, man's power, in so far as he is composed of mind and body;
it follows that all those things which bring pleasure are good.
But seeing that things do not work with the object of giving us
pleasure, and that their power of action is not tempered to suit
our advantage, and, lastly, that pleasure is generally referred
to one part of the body more than to the other parts; therefore
most emotions of pleasure (unless reason and watchfulness be at
hand), and consequently the desires arising therefrom, may become
excessive. Moreover we may add that emotion leads us to pay most
regard to what is agreeable in th