Enneads IV.4: Questions About the Soul
Exclusion of Other Side Issues
We have just demonstrated that sensation belongs exclusively to an embodied soul, and that this implies organs. But we have nothing to do with the question whether the perceived object must be in contact with the organ, or whether the sensation can take place at a distance from the sense-object, by means of an intermediary; as the case of the fire which is located at a distance from our body, without the intermediary's suffering in any manner. It happens again where, empty space serving as intermediary between the eye and the color, one may well ask whether, to see, it suffice to possess the potentiality proper to that organ. But it is sure that sensation is some activity of the soul in a body, or through a body.
ARE THE SENSES GIVEN US ONLY FOR THE SAKE OF UTILITY?
24. Whether the senses were given us for the sake of utility must be examined as follows. If the soul were separated from the body, she would not feel; she feels only when united to a body; therefore she feels by and for the body. It is from the soul's intimacy with the body that sensation results, either because all passions, when keen enough, reach the soul; or whether the senses were made for us to take care that no object approaches too near us, or exercises on our organs an action strong enough to destroy them. If so, the senses were given us for the sake of utility. Even if the senses do serve to acquire knowledge and information, they would be of no use to a being who possesses knowledge, but only to one who needs to learn he has the misfortune of being ignorant, or who needs to remember, because he is subject to forgetfulness. They are therefore not found in the being who has no need to learn, and who does not forget.