But if each of the two phases of the soul, as we have said, possesses memory, and memory is vested in the imaging faculty, there must be two such faculties. Now that is all very well as long as the two souls stand apart; but, when they are at one in us, what becomes of the two faculties, and in which of them is the imaging faculty vested? If each soul has its own imaging faculty the images must in all cases be duplicated, since we cannot think that one faculty deals only with INTELLECTUAL OBJECTS, and the other with objects of sense, a distinction which inevitably implies the co-existence in man of two life-principles utterly unrelated. Enneads IV,3,31
If sensation is apprehension by means of the soul’s employment of the body, intellection cannot be a similar use of the body or it would be identical with sensation. If then intellection is apprehension apart from body, much more must there be a distinction between the body and the intellective principle: sensation for objects of sense, intellection for the intellectual object. And even if this be rejected, it must still be admitted that there do exist intellections of INTELLECTUAL OBJECTS and perceptions of objects not possessing magnitude: how, we may then ask, can a thing of magnitude know a thing that has no magnitude, or how can the partless be known by means of what has parts? We will be told “By some partless part.” But, at this, the intellective will not be body: for contact does not need a whole; one point suffices. If then it be conceded – and it cannot be denied – that the primal intellections deal with objects completely incorporeal, the principle of intellection itself must know by virtue of being, or becoming, free from body. Even if they hold that all intellection deals with the ideal forms in Matter, still it always takes place by abstraction from the bodies (in which these forms appear) and the separating agent is the Intellectual-Principle. For assuredly the process by which we abstract circle, triangle, line or point, is not carried through by the aid of flesh or Matter of any kind; in all such acts the soul or mind must separate itself from the material: at once we see that it cannot be itself material. Similarly it will be agreed that, as beauty and justice are things without magnitude, so must be the intellective act that grasps them. Enneads IV,7,8
Now, if the Intellectual-Principle in its act – that is in knowing the intellectual – is to know these its objects as alien, we have to explain how it makes contact with them: obviously it might never come upon them, and so might never know them; or it might know them only upon the meeting: its knowing, at that, would not be an enduring condition. If we are told that the Intellectual-Principle and the Intellectual Objects are linked in a standing unity, we demand the description of this unity. Enneads V,5,1
Knowledge in the reasoning soul is on the one side concerned with objects of sense, though indeed this can scarcely be called knowledge and is better indicated as opinion or surface-knowing; it is of later origin than the objects since it is a reflection from them: but on the other hand there is the knowledge handling the INTELLECTUAL OBJECTS and this is the authentic knowledge; it enters the reasoning soul from the Intellectual-Principle and has no dealing with anything in sense. Being true knowledge it actually is everything of which it takes cognisance; it carries as its own content the intellectual act and the intellectual object since it carries the Intellectual-Principle which actually is the primals and is always self-present and is in its nature an Act, never by any want forced to seek, never acquiring or traversing the remote – for all such experience belongs to soul – but always self-gathered, the very Being of the collective total, not an extern creating things by the act of knowing them. Enneads V,9,7