This seminar is close study of passages in Plato and Aristotle on the soul and reason and the connection of reason to knowledge and desire.

The rough idea is that Socrates took the pioneering step. He thought that human beings were psychological beings. Further, given his pursuit of wisdom, he seemed to have a view about how the soul functions. Plato rejected parts of the Socratic picture and worked to put another in its place. Aristotle tried to put the broad outline of the Platonic theory in what he regarded as more plausible ontology of the soul and its relation to the body. The goal in this seminar is to work out this interpretation in detail and to correct it if necessary.

In addition to the work of Plato and Aristotle, we will consult some of the secondary literature on the topic.

The primary prerequisite for this seminar is PHI 328 (History of Ancient Philosophy) or the equivalent.


Course Details

The final grade is a function of attendance and participation (20%), two informal presentations (20%), two bibliography projects (20%), and a term paper (40%). Attendance is necessary condition for passing the seminar. In addition, you should be prepared to talk through a problem or argument from the reading (including any background needed for understanding). On the first day, I will set out the requirements for presentations, the bibliography projects, and the term paper. The requirements are the usual ones for the most part.

The assignments (participation, presentations, bibliography projects, term paper) are given plus-minus letter grades, A+ to E. ASU's numerical value for the letter grades (A+ = 4.3, A = 4.0, A- = 3.7, B+ = 3.3, B = 3.00, B- = 2.67, C+ = 2.33, C = 2.00, D = 1.00, E = 0) is used to compute a weighted average of those grades. This weighted average determines the course grade.

Example using the above assignments: participation, A- (3.7), presentations, A- (3.7), A- (3.7), bibliography projects, B (3.0), B (3.0), term paper B+ (3.3). Weighted average: 20%(3.7) + 10%(3.7) + 10%(3.7) + 10%(3.0) + 10%(3.0) + 40%(3.3) = .74 +.37 + .37 + .30 + .30 + 1.32 = 3.40. The final grade for the course is B+, since 3.40 is closest to 3.3 (= B+).

Incompletes are given only to accommodate serious illnesses and family emergencies, which must be adequately documented.


Course Itinerary

(Additional readings to be added as the seminar progresses.)


1. Review of the main lines of thought
Answers to basic questions about the history of ancient philosophy.

There is no point in proceeding without the background knowledge. This will probably occupy us in the first couple sessions of the seminar.


2. Reason and Experience in the Presocratics
The Milesian revolution, Parmenides (DK 28 B 7), Democritus (DK 78 B 11)

The rationalist line of thought (which is the dominant position in ancient philosophy) seems to enter the tradition in the Preosocratic Period.


3. Socrates on the "soul" (ψυχή)
Apology 29c-30b
(Translations of Plato and Aristotle are available for free in the Perseus Digital Library. These translations are not new, but for the most part they are good enough for the purposes of this course.)

The Clouds of Aristophanes shows that Socrates talked about the soul as early as 423 BCE, when Socrates was in his middle forties and Plato was a boy. We need to understand what Socrates was thinking. This sets the stage for what, in hindsight, turned out to be a long line of thinking about human beings as psychological beings.

"Introduction", Michael Frede. Rationality in Greek Thought, edited by Michael Frede and Gisela Striker. Oxford University Press, 1996.


4. Socratic intellectualism
Protagoras 352a-358e, Gorgias 448c, 462b-465d, 467a-468e, 472c-d, 500a-501c, 521d-522a, Meno 77b-78c, 97e-98a

Socrates was a perplexing figure. Plato tries to understand what he had in mind.

"Introduction", Michael Frede Plato, Protagoras. Translated, with Notes, by Stanley Lombardo & Karen Bell. Hackett, 1992.


5. The Tripartite Theory of the Soul
Republic IV.436a-442a, X.602d-603b

Plato rejects Socratic intellectualism and explores another theory to put in its place.

Selections from The Brute Within: Appetitive Desire in Plato and Aristotle, Hendrik Lorenz. Oxford University Press, 2006.
Lorenz has revised parts of his book in "The cognition of appetite in Plato's Timaeus," Plato and the Divided Self. Cambridge University Press, 2012.


6. Belief and Cognition in the Nonrational Parts of the Soul
Theaetetus 184b-187a, Timaeus 71a-77b, Philebus 33a-39b

In Book X of the Republic, the nonrational parts of the soul can have beliefs. In the Timaeus, belief is restricted to the rational part of the soul. Plato seems to have come to think of belief as an achievement of reason. This new way of thinking about belief discussed in the Theaetetus. Although Plato comes to think that beliefs are an achievement of reason, he keeps main claims in the Tripartite Theory of the Soul that he presents in the Republic. In particular, he believes that the nonrational parts of the soul can by themselves move a human being.


7. The Theory of Induction
Posterior Analytics II.19, Metaphysics I.1,

Aristotle rejects Plato's ontology of the soul and its relation to the body, but he seems to accept the broad Platonic conception of reason and the soul. This seems to be the import of Aristotle's theory of induction. Aristotle's discussion is brief and difficult, but it is also one of the most important in this tradition.

"Aristotle's Rationalism" in Rationality in Greek Thought, Michael Frede. Edited by Michael Frede and Gisela Striker. Oxford University Press, 1996.
"An empiricist view of knowledge: memorism", Michael Frede. Companions to Ancient Thought, Volume I: Epistemology, edited by S. Everson. University of Cambridge Press, 1990.
"Aristotle on thinking", Michael Frede. Rhizai 2008.



8. Aristotle on reason and desire and related psychological states
On the soul III.3-13, Nicomachean ethics I.7, I.13-II.6, III.1-5, VI.1-13, VII.1-10

Aristotle provides a relatively detailed account of how the soul functions to produce action.

Selections from The Brute Within: Appetitive Desire in Plato and Aristotle, Hendrik Lorenz. Oxford University Press, 2006. "

Chapter 2 of A Free Will, Michael Frede. University of California Press, 2011.
"Virtue Of Character In Aristotle's Nicomachean Ethics," Hendrik Lorenz. Oxford Studies in Ancient Philosophy, 2009.
Aristotle's Analysis of Akratic Action," Hendrik Lorenz. The Cambridge Companion to Aristotles Nicomachean Ethics, 2014.
"The ΕΦ' ΗΜΙΝ in Ancient Philosophy", MIchael Frede. Philosophia, 2007.

Nicomachean Ethics VII.4: Plain and qualified akrasia," Hendrik Lorenz. Symposium Aristotelicum: Aristotle’s Nicomachean Ethics, Book VII. Oxford University Press, 2009.
"Introduction" in Nicomachean ethics, Books II-IV, C.C.W. Taylor. Oxford University Press, 2006.



Contact Information:

Thomas A. Blackson
Philosophy Faculty
School of Historical, Philosophical, and Religious Studies
Lattie F. Coor Hall, room 3356
PO Box 874302
Arizona State University
Tempe, AZ. 85287-4302
blackson@asu.edu, tomblackson.com, www.public.asu/~blackson