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. Ennead IV,7,
But it is not inevitable that every intellectual object should both possess the intellective principle in itself and exercise intellection: at that, it would be not merely object but subject as well and, besides, being thus dual, could not be primal: further, the intellectual principle that is to possess the intellectual object could not cohere unless there existed an essence purely intellectual, something which, while standing as intellectual object to the intellectual principle, is in its own essence neither an agent nor an object of intellection. The intellectual object points to something beyond itself [to a percipient]; and the intellectual agent has its intellection in vain unless by seizing and holding an object – since, failing that, it can have no intellection but is consummated only when it possesses itself of its natural term. Ennead V,6,