But why do not all the powers of the soul act everywhere? Now if we consider the Soul which is one everywhere, we find that sensation is not similar in all its parts (that is, in all the individual souls); that reason is not in all (but in certain souls exclusively); and that the vegetative power is granted to those beings who do not possess sensation, and that all these powers return to unity when they separate from the body. THE BODY'S POWER OF GROWTH IS DERIVED FROM THE WHOLE, AND THE SOUL; BUT NOT FROM OUR SOUL. If, however, the body derive its vegetative power from the Whole and from this (universal) Soul which is one, why should it not derive it also from our soul? Because that which is nourished by this power forms a part of the universe, which possesses sensation only at the price of "suffering." As to the sense-power which rises as far as the judgment, and which is united to every intelligence, there was no need for it to form what had already been formed by the Whole, but it could have given its forms if these forms were not parts of the Whole which produces them. THE UNITY OF THE SOULS IS A CONDITION OF THEIR MULTIPLICITY. 4. Such justifications will preclude surprise at our deriving all souls from unity. But completeness of treatment demands explanation how all souls are but a single one. Is this due to their proceeding from a single Soul, or because they all form a single one? If all proceed from a single one, did this one divide herself, or did she remain whole, while begetting the multitude of souls? In this case, how could an essence beget a multitude like her, while herself remaining undiminished? We shall invoke the help of the divinity (in solving this problem); and say that the existence of the one single Soul is the condition of the existence of the multitude of souls, and that this multitude must proceed from the Soul that is one. THE SOUL CAN BEGET MANY BECAUSE SHE IS AN INCORPOREAL ESSENCE.