But is the soul herself a sense-being, if she be disposed in a particular way, and if she contain particular "reasons" (that is, faculties, virtues, sciences and arts, all of which refer to the body, and which have been classified as sense-qualities)?[402] It has already been explained that these "reasons" themselves are not corporeal; but that they have been classified among sense-qualities only because they referred to the body, and to the actions thereby produced. On the other hand, as sense-quality has been defined as the meeting of all the above enumerated entities, it is impossible to classify incorporeal Being in the same genus as the sensual being. As to the qualities of the soul, they are all doubtless incorporeal, but as they are experiences (or, sufferings, or, passions) which refer to terrestrial things, they must be classified in the genus of quality, just as the reasons of the individual soul. Of the soul we must therefore predicate experience, however dividing the latter in two elements, one of which would refer to the object to which it is applied, and the other to the subject in which it exists.[403] Though then these experiences cannot be considered as corporeal qualities, yet it must be admitted they relate to the body.[404] On the other hand, although we classify these experiences in the genus of quality, still the soul herself should not be reduced to the rank of corporeal being. Last, when we conceive of the soul as without experiences, and without the "reasons" above-mentioned, we are thereby classifying her along with the World from which she descends,[405] and we leave here below no intelligible being, of any kind whatever. QUALITIES ARE CLASSIFIED AS CORPOREAL AND OF THE SOUL. 17. Qualities, therefore, should be classified as of the body, and of the soul.[406] Even though all the souls, as well as their immaterial qualities, be considered as existing on high, yet their inferior qualities must be divided according to the senses, referring these qualities either to sight, hearing, feeling, taste, or smell. Under sight, we will classify the differences of colors; under hearing, that of the sounds; and likewise, with the other senses. As to the sounds, inasmuch as they have but a single quality, they will have to be classified according to their being soft, harsh, agreeable, and the like. DIFFERENCES OF BEING SHOULD BE DISTINGUISHED ACCORDING TO QUALITY. It is by quality that we distinguish the differences which inhere in being, as well as the actualizations, the beautiful or ugly actions, and in general, all that is particular. Only very rarely do we discover in quantity differences which constitute species; so much is this the case, that it is generally divided by its characteristic qualities. We must therefore leave quantity aside, and that leads us to wonder how we may divide quality itself (since it is made use of to distinguish other things).[407] DIFFERENCE OF QUALITY CANNOT BE DISTINGUISHED BY SENSATION.