AGAINST THE STOICS, SENSATIONS ARE NOT IMPRESSIONS OF A SEAL ON WAX.
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.