entering into the interstices of the water, do to the water what
water does to earth and fire to air (The text seems to be
corrupt.), and are the sole causes of the compound body of earth
and water liquefying and becoming fluid. Now these bodies are of
two kinds; some of them, such as glass and the fusible sort of
stones, have less water than they have earth; on the other hand,
substances of the nature of wax and incense have more of water
entering into their composition.
I have thus shown the various classes of bodies as they are
diversified by their forms and combinations and changes into one
another, and now I must endeavour to set forth their affections
and the causes of them. In the first place, the bodies which I
have been describing are necessarily objects of sense. But we
have not yet considered the origin of flesh, or what belongs to
flesh, or of that part of the soul which is mortal. And these
things cannot be adequately explained without also explaining the
affections which are concerned with sensation, nor the latter
without the former: and yet to explain them together is hardly
possible; for which reason we must assume first one or the other
and afterwards examine the nature of our hypothesis. In order,
then, that the affections may follow regularly after the
elements, let us presuppose the existence of body and soul.
First, let us enquire what we mean by saying that fire is hot;
and about this we may reason from the dividing or cutting power
which it exercises on our bodies. We all of us feel that fire is
sharp; and we may further consider the fineness of the sides, and
the sharpness of the angles, and the smallness of the particles,
and the swiftness of the motion—all this makes the action of fire
violent and sharp, so that it cuts whatever it meets. And we must
not forget that the original figure of fire (i.e. the pyramid),
more than any other form, has a dividing power which cuts our
bodies into small pieces (Kepmatizei), and thus naturally
produces that affection which we call heat; and hence the origin
of the name (thepmos, Kepma). Now, the opposite of this is
sufficiently manifest; nevertheless we will not fail to describe
it. For the larger particles of moisture which surround the body,
entering in and driving out the lesser, but not being able to
take their places, compress the moist principle in us; and this
from being unequal and disturbed, is forced by them into a state
of rest, which is due to equability and compression. But things
which are contracted contrary to nature are by nature at war, and
force themselves apart; and to this war and convulsion the name
of shivering and trembling is given; and the whole affection and