D. HOW CAN THE SOUL SIMULTANEOUSLY BE DIVISIBLE AND INDIVISIBLE?
A DECISION WILL DEPEND ON THE MEANING OF THE TERMS.
19. Must we consider that (in the soul), the indivisible and the divisible are identical, as if they were mingled together? Or should we consider the distinction between the indivisible and the divisible from some other point of view? Should the first be considered as the higher part of the soul, and the latter as the lower, just exactly as we say that one part of the soul is rational, and the other part is irrational? Such questions can be answered only by a close scrutiny of the nature of the divisibility and indivisibility of the soul.
THE BODY NEEDS THE SOUL FOR LIFE.
When Plato says that the soul is indivisible, he speaks absolutely. When he insists that she is divisible, it is always relatively (to the body). He does indeed say that she becomes divisible in the bodies, but not that she has become such. Let us now examine how, by her nature, the body needs the soul to live, and what necessity there is for the soul to be present in the entire body.
SENSE, GROWTH AND EMOTION TEND TOWARDS DIVISIBILITY.
By the mere fact that it feels by means of the entire body, every sense-power undergoes division. Since it is present everywhere, it may be said to be divided. But as, on the other hand, it manifests itself everywhere as a whole, it cannot really be considered as divided. We cannot go further than the statement that it becomes divisible in bodies. Some might object that it was divided only in the sense of touch. It is however also divided in the other senses, since it is always the same body that receives it, but only less so. The case is the same with the power of growth and nutrition; and if appetite have its seat in the liver, and anger in the heart, these appetites must be subject to the same conditions. Besides, it is possible that the body does not receive those appetites in a mixture, or that it receives them in some other manner, so that they result from some of the things that the body derives from the soul by participations. Reason and intelligence, however, are not communicated to the body because they stand in no need of any organs to fulfil their functions. On the contrary, they find in them only an obstacle to their operations.
THE SOUL AS A WHOLE OF TWO DISTINCT DIVISIBLE AND INDIVISIBLE PARTS.
Thus the indivisible and the divisible are in the soul two distinct parts, and not two things mingled together so as to constitute but a single one. They form a single whole composed of two parts, each of which is pure and separable from the other by its characteristic power. If then the part which in the body becomes divisible receives from the superior part the power of being indivisible, this same part might simultaneously be divisible and indivisible, as a mixture of divisible nature and of the (indivisible) power received by it from the higher part.