The heart, the knot of the veins and the fountain of the blood
which races through all the limbs, was set in the place of guard,
that when the might of passion was roused by reason making
proclamation of any wrong assailing them from without or being
perpetrated by the desires within, quickly the whole power of
feeling in the body, perceiving these commands and threats, might
obey and follow through every turn and alley, and thus allow the
principle of the best to have the command in all of them. But the
gods, foreknowing that the palpitation of the heart in the
expectation of danger and the swelling and excitement of passion
was caused by fire, formed and implanted as a supporter to the
heart the lung, which was, in the first place, soft and
bloodless, and also had within hollows like the pores of a
sponge, in order that by receiving the breath and the drink, it
might give coolness and the power of respiration and alleviate
the heat. Wherefore they cut the air-channels leading to the
lung, and placed the lung about the heart as a soft spring, that,
when passion was rife within, the heart, beating against a
yielding body, might be cooled and suffer less, and might thus
become more ready to join with passion in the service of reason.
The part of the soul which desires meats and drinks and the other
things of which it has need by reason of the bodily nature, they
placed between the midriff and the boundary of the navel,
contriving in all this region a sort of manger for the food of
the body; and there they bound it down like a wild animal which
was chained up with man, and must be nourished if man was to
exist. They appointed this lower creation his place here in order
that he might be always feeding at the manger, and have his
dwelling as far as might be from the council-chamber, making as
little noise and disturbance as possible, and permitting the best
part to advise quietly for the good of the whole. And knowing
that this lower principle in man would not comprehend reason, and
even if attaining to some degree of perception would never
naturally care for rational notions, but that it would be led
away by phantoms and visions night and day,—to be a remedy for
this, God combined with it the liver, and placed it in the house
of the lower nature, contriving that it should be solid and
smooth, and bright and sweet, and should also have a bitter
quality, in order that the power of thought, which proceeds from
the mind, might be reflected as in a mirror which receives
likenesses of objects and gives back images of them to the sight;
and so might strike terror into the desires, when, making use of
the bitter part of the liver, to which it is akin, it comes