Consider, then, the powers of soul itself in its own right, or those of the creature that possesses it, the living being considered jointly with body. According to those who hold that soul lives a twofold life, both in itself and with body, the powers are present in one way to soul and in another to the combined living being, ⟨as⟩ in the accounts of Plato and Pythagoras;1434
33.4 · Powers in a single composite life
I.49.33.4 · Wachsmuth pp. 368
but according to those who hold that soul has a single life, the life of the composite, there is one mode in which the powers are present. This may be because soul is blended with body, as the Stoics say, or because it gives its entire life to the combined living being, as the Peripatetics insist. On these accounts the powers are present by being participated in, or by being blended with the whole living being.1435
33.5 · Different organs and different qualities
I.49.33.5 · Wachsmuth pp. 368
How, then, are they distinguished? According to the Stoics, some are distinguished by the difference of ⟨the⟩ underlying bodies. They say that currents of vital breath extend from the ruling center in different directions: some to the eyes, others to the ears, and others to the remaining sense organs. Others are distinguished by a specific quality in the same underlying subject. Just as an apple has sweetness and fragrance in the same body, so the ruling center comprises presentation, assent, impulse, and reason in the same subject.1436
33.6 · Distinction by what the powers can do
I.49.33.6 · Wachsmuth pp. 368
According to the Aristotelians and all who conceive soul as indivisible, the powers are undivided in substance, but distinguished according to the kinds of things they can do.1437
33.7 · Three parts and many powers
I.49.33.7 · Wachsmuth pp. 368-369
In Plato’s account, soul is called three-part in one sense, as varying threefold in life among distinct substances; in another sense it has many powers, no longer differing in the substance of life, but distinguished by many specific characteristics within the same subject.1438
33.8 · How a part differs from a power
I.49.33.8 · Wachsmuth pp. 369
In general, a part differs from a power in this: a part signifies a difference of substance, while a power signifies a generative or productive distinction within the same subject.1439
34.1 · Eight parts and further powers
I.49.34.1 · Wachsmuth pp. 369
In the same work: on the number of powers.
The followers of Zeno hold that soul has eight parts, with further powers belonging to ⟨it⟩, such as those in the ruling center: presentation, assent, impulse, and reason.1440
34.2 · The threefold division and virtue
I.49.34.2 · Wachsmuth pp. 369
Plato’s followers, Archytas, and the other Pythagoreans declare soul to have three parts, dividing it into reasoning, spirit, and desire; for these, they say, are useful for establishing the virtues.1441
34.3 · Enumerations of powers
I.49.34.3 · Wachsmuth pp. 369
As powers of soul they reckon nature, presentation, perception, opinion, thought that moves bodies, desire for things beautiful and good, and acts of understanding. Aristotle divides them into five: nature, perception, movement from place to place, desire, and thought.1442
35.1 · Essential and added powers
I.49.35.1 · Wachsmuth pp. 369
In the same work: on powers belonging to soul’s substance and powers added to it.
Plotinus removes from it the irrational powers, the perceptions, the representations, the memories, and the processes of reasoning. Only pure reasoning does he refer to its pure substance, as possessing a power naturally bound to the very form of that substance.1443
35.2 · Powers and two kinds of life
I.49.35.2 · Wachsmuth pp. 370
The Platonists around Democritus bring all these kinds of powers together within its substance.1444
Plato makes them belong both to themselves and to living beings, defining each relation according to the corresponding kind of life.1445
35.3 · Powers projected into the whole
I.49.35.3 · Wachsmuth pp. 370
The followers of Porphyry and Plotinus declare that soul projects into each part of the whole the powers appropriate to it. They [the Platonists around Porphyry and Plotinus] determine that the lives projected in whatever way are relinquished and cease to exist, much as things growing from a seed do whenever the seed withdraws into itself;1446
35.4 · A possible alternative
I.49.35.4 · Wachsmuth pp. 370
but someone might perhaps devise a more novel view, not implausibly: that these lives too remain in the whole and do not perish.1447
36.1 · Soul’s activities: motion and rest
I.49.36.1 · Wachsmuth pp. 370
In the same work: on the activities of soul.
Who, then, has not heard the Peripatetic opinion that soul is itself unmoved but is a cause of motions? If what is unmoved is also inactive, the inactivity of soul will also be the source that supplies its activities.1448