Chapter XX: Section III (6)

Every connate vehicle of the soul, possesses both a form and
magnitude perpetually the same. But it appears to be both
greater and less, and endued with a dissimilar figure, through
the additions and ablations of other bodies.

For if it derives its essence from an immoveable cause, it is evident that both its figure and magnitude is derived from this cause: and each is immutable and invariable. But it appears differently at different times, as likewise greater, and less. Hence through the intervention of other bodies added from the material elements and again taken way, it exhibits a different appearance both in quantity and form.

PROPOSITION CCXI.

Every particular soul, descending into generation descends totally. Nor
does any part of it remain on high, and another part descend.

For if any thing belonging the soul remains in the intelligible world, it either perpetually understands without transition, or transitively. But if without transition, it will be intellect, and not a part of the soul; and this particular soul will be that which proximately participates of intellect. But this is impossible. And if transitively, that which is perpetually, and that which is only sometimes intelligent, will form one essence. But this likewise is impossible: for all these differ, as we have previously shewn. Add too, the absurdity which results from supposing that the summit of the soul is perpetually perfect, and yet does not rule over the other powers, and give them perfection. Every particular soul, therefore, totally descends.

THE END.