How then arise these affections common to the soul and the body? Shall we then say that desire derives from the desire-appetite,[293] anger from the anger-appetite, or in short, every emotion or affliction from the corresponding appetite? But even so, they will not be common, and they will belong exclusively to the soul, or to the body. There are some whose origin needs the excitation of blood and bile, and that the body be in some certain state which excites desire, as in physical love. On the contrary, however, the desire of goodness is no common affection; it is an affection peculiar to the soul, as are several others. Reason, therefore, does not allow us to consider all affections as common to soul and body.
DESIRE, NOT SIMULTANEOUS WITH APPETITE.
Is it possible, however, that for example, in physical love, the man[294] may experience a desire simultaneously with the corresponding appetite? This is impossible, for two reasons. If we say that the man begins to experience the desire, while the corresponding appetite continues it, it is plain the man cannot experience a desire without the activity of the appetite. If on the other hand it be the appetite that begins, it is clear that it cannot begin being excited unless the body first find itself in suitable circumstances, which is unreasonable.
SOUL AND BODY, BY UNITING, FORM AN INDIVIDUAL AGGREGATE.
6. It would, however, probably be better to put the matter thus: by their presence, the faculties of the soul cause reaction in the organs which possess them, so that while they themselves remain unmoved, they give them the power to enter into movement.[295] In this case, however, when the living organism experiences suffering, the life-imparting cause must itself remain impassible, while the passions and energies belong wholly to that which receives life. In this case, therefore, the life will not belong exclusively to the soul, but to the conjunction of the soul and body; or, at least, the latter's life will not be identical with the soul's, nor will it be the faculty of sensation, which will feel, but the being in whom that faculty inheres.
SENSATION IMPLIES FEELING SOUL.
If, however, sensation, which is no more than a corporeal emotion, finds its term in the soul, the soul must surely feel sensation; therefore it does not occur as an effect of the presence of the faculty of sensation, for this ignores the feeling agent back of it. Nor is it the conjunction of soul and body, for unless the faculty of sensation operate, that aggregate could not feel, and it would then no longer include as elements either the soul, or the faculty of sensation.
SOUL-LIGHT FORMS ANIMAL NATURE.
7. The aggregate results from the presence of the soul, not indeed that the soul enters into the aggregate, or constitutes one of its elements. Out of this organized body, and of a kind of light furnished by herself, the soul forms the animal nature, which differs both from soul and body, and to which belongs sensation, as well as all the passions attributed to the animal.[296]