Not in this manner is intelligence perceived; this can occur only by turning towards itself, and by contemplating itself. If it left the contemplation of its own actualizations, if it ceased to be their contemplation (or, intuition), it would no longer think anything. Intelligence perceives the intelligible entity as sensation perceives the sense-object, by intuition. But in order to contemplate the sense-object, sensation applies to what is outside of it, because its object is material. On the contrary, in order to contemplate the intelligible entity, intelligence concentrates in itself, instead of applying itself to what is outside of it. That is why some philosophers have thought that there was only a nominal difference between intelligence and imagination; for they believed that intelligence was the imagination of the reasonable animal; as they insisted that everything should depend on matter and on corporeal nature, they naturally had to make intelligence also depend therefrom. But our intelligence contemplates natures (or, "beings"). Therefore, (according to the hypothesis of these philosophers) our intelligence will contemplate these natures as located in some place. But these natures are outside of matter; consequently, they could not be located in any place. It is therefore evident that the intelligible entities had to be posited as within intelligence. If the intelligible entities be within intelligence, intelligence will contemplate intelligible entities and will contemplate itself while contemplating them; by understanding itself, it will think, because it will understand intelligible entities. Now intelligible entities form a multitude, for[338] intelligence thinks a multitude of intelligible entities, and not a unity; therefore, intelligence is manifold. But manifoldness presupposes unity; consequently, above intelligence, the existence of unity will be necessary. 34. (5) Intellectual being is composed of similar parts, so that existing beings exist both in individual intelligence, and in universal Intelligence. But, in universal Intelligence, individual (entities) are themselves conceived universally; while in individual intelligence, universal beings as well as individual beings are conceived individually. SIXTH ENNEAD, BOOK FOUR. The One and Identical Being Is Everywhere Present As a Whole. OF THE INCORPOREAL.