Enneads I.1: The Organism and the Self
Aristotelian Hypothesis Considered
Should we say that the soul is in the body, as form in matter? In this case, she is “being,” and she would be a separable form. If then she be in the body as, in the case of the axe, the schematic figure is in the iron, so as by her own proper virtue, to form the power of doing what iron thus formed accomplishes, we will have all the more reason to attribute the common passions to the body, which is an organized physical tool possessing potential life. For if as (Plato) says it be absurd to suppose that it is the soul that weaves, it is not any more reasonable to attribute the desires and griefs to the soul; rather, by far, to the living organism.
5. The “living organism” must mean either the thus organized body, or the common mixture of soul and body, or some third thing which proceeds from the two first. In either of these three cases the soul will have to be considered impassible, while the power of experiencing passions will inhere in something else; or the soul will have to share the body’s passions, in which case the soul will have to experience passions either identical or analogous to those of the body, so that to a desire of the animal there will correspond an act or a passion of the concupiscible appetite.