Besides, if the principle that feels were corporeal, it could feel only
so long as exterior objects produced in the blood or in the air some
impression similar to that of a seal on wax.[55] If they impressed
their images on wet substances, as is no doubt supposed, these
impressions would become confused as images in water, and memory would
not occur. If, however, these impressions persisted, they would either
form an obstacle to subsequent ones, and no further sensation would
occur; or they would be effaced by the new ones, which would destroy
memory. If then the soul is capable of recalling earlier sensations,
and having new ones, to which the former would form no obstacle, it is
because she is not corporeal.