sense-forms

When Plato, rightfully, calls matter “the location of forms,” he is not thereby attributing any passion to matter; he only indicates that matters go on in a different manner. How? Since matter, however, by its nature, cannot be any of the beings, and as it must flee from the “being” of all beings, and be entirely different from them — for (”seminal) reasons” are genuine beings — it must necessarily preserve its nature by virtue of this very difference. It must not only contain all beings, but also not appropriate what is their image; for this is that by which matter differs from all beings. Otherwise, if the images that fill a mirror were not transient, and if the mirror remained invisible, evidently we would believe that the things the mirror presents to us existed really. If then there be something in a mirror, that is that which sense-forms are in matter. If in a mirror there be nothing but appearance, then there is nothing in matter but appearance, recognizing that this appearance is the cause of the existence of beings, an existence in which the things that exist always really participate, and in which the things which do not really exist do not participate; for they could not be in the condition where they would be if they existed without the existence of existence in itself. [Ennead III,6 (26) 13]