19. That is why there is pleasure and pain. That is why grief is said
to be a perception of dissolution, when the body is threatened with
the loss of the image of the soul (of being disorganized by losing the
irrational soul). That is why it is said that pleasure is a perception
produced in the animal when the image of the soul reassumes its sway
over the body. It is the body which undergoes passion; but it is
the sense-potentiality of the soul which perceives the passion by
its relation with the organs; it is she to which all the sensations
ultimately report themselves. The body alone is injured and suffers;
for example, when one member is cut, it is the mass of the body which
is cut; the soul feels pain not merely as a mass, but as a living
mass. It is likewise with a burn: the soul feels it, because the
sense-potentiality as it were receives its reaction by its relations
with the organs. The soul entire feels the passion produced in the body
without however herself experiencing it.