As to the faculty of sensation which is peculiar to the soul, it cannot
be the power of perceiving the sense-objects themselves, but only
their typical forms, impressed on the animal by sensation. These have
already somewhat of the intelligible nature; the exterior sensation
peculiar to the animal is only the image of the sensation peculiar to
the soul; which, by its very essence is truer and more real, since it
consists only in contemplating images while remaining impassible.[298]
Ratiocination, opinion and thought, which principally constitute
us,[299] deal exclusively with these images, by which the soul has the
power of directing the organism.