How shall we start, and later arrive at the contemplation of this ineffable beauty which, like the divinity in the mysteries, remains hidden in the recesses of a sanctuary, and does not show itself outside, where it might be perceived by the profane? We must advance into this sanctuary, penetrating into it, if we have the strength to do so, closing our eyes to the spectacle of terrestrial things, without throwing a backward glance on the bodies whose graces formerly charmed us. If we do still see corporeal beauties, we must no longer rush at them, but, knowing that they are only images, traces and adumbrations of a superior principle, we will flee from them, to approach Him of whom they are merely the reflections. Whoever would let himself be misled by the pursuit of those vain shadows, mistaking them for realities, would grasp only an image as fugitive as the fluctuating form reflected by the waters, and would resemble that senseless (Narcissus) who, wishing to grasp that image himself, according to the fable, disappeared, carried away by the current. Likewise he would wish to embrace corporeal beauties, and not release them, would plunge, not his body, but his soul into the gloomy abysses, so repugnant to intelligence; he would be condemned to total blindness; and on this earth, as well as in hell, he would see naught but mendacious shades. [Ennead I,6 (1) 8]
In general the sensation of sight consists of perception of the visible object, and by sight we attain it in the place where the object is placed before our eyes, as if the perception operated in that very place, and as if the soul saw outside of herself. This occurs, I think, without any image being produced nor producing itself outside of the soul, without the soul receiving any impression similar to that imparted by the seal to the wax. Indeed, if the soul already in herself possessed the image of the visible object, the mere possession of this image (or type) would free her from the necessity of looking outside of herself. The calculation of the distance of the object’s location, and visibility proves that the soul does not within herself contain the image of the object. In this case, as the object would not be distant from her, the soul would not see it as located at a distance. Besides, from the image she would receive from within herself, the soul could not judge of the size of the object, or even determine whether it possessed any magnitude at all. For instance, taking as an example the sky, the image which the soul would develop of it would not be so great (as it is, when the soul is surprised at the sky’s extent). Besides, there is a further objection, which is the most important of all. If we perceive only the images of the objects we see, instead of seeing the objects themselves, we would see only their appearances or adumbrations. Then the realities would differ from the things that we see. The true observation that we cannot discern an object placed upon the pupil, though we can see it at some little distance, applies with greater cogency to the soul. If the image of the visible object be located within her, she will not see the object that yields her this image. We have to distinguish two things, the object seen, and the seeing subject; consequently, the subject that sees the visible object must be distinct from it, and see it as located elsewhere than within itself. The primary condition of the act of vision therefore is, not that the image of the object be located in the soul, but that it be located outside of the soul. [Ennead IV,6 (41) 8]