In the tripartite psychology of the Republic, Plato characterizes the “spirited” part of the soul as the “ally of reason”: like the auxiliaries of the just city, whose distinctive job is to support the policies and judgments passed down by the rulers, spirit’s distinctive “job” in the soul is to support and defend the practical decisions and commands of the reasoning part. This is to include not only defense against external enemies who might interfere with those commands, but also, and (...) most importantly, defense against unruly appetites within the individual’s own soul.1 Spirit, according to this picture, is by nature reason’s faithful auxiliary in the soul, while appetite is always a potential enemy to be watched .. (shrink)

Many philosophers today approach important psychological phenomena, such as weakness of the will and moral motivation, using a broadly Humean distinction between beliefs, which aim to represent the world, and desires, which aim to change the world. On this picture, desires provide the ends or goals of action, while beliefs simply tell us how to achieve those ends. In the Republic, Socrates attempts to explain the phenomena using a different distinction: he argues that the human soul or psyche consists in (...) reason, spirit, and appetite. It is initially tempting to assimilate Socrates’ picture to the standard belief ⁄ desire model, and to think that reason’s role in motivating action is restricted to calculating the best means for satisfying spirited and appetitive desires. But this would be a mistake, since Socrates thinks that each element in the soul is capable of setting the ends of action. But then how exactly should we understand these elements? My aim in this essay is to introduce the reader to Plato’s theory of the tripartite psychology. In part 2, I present Socrates’ argument for the claim that the soul has three elements. In part 3, I provide a general characterization of reason, spirit, and appetite, respectively. I then turn to discuss two central interpretive issues. In part 4, I discuss the sense in which Socrates considers the appetitive and spirited elements to be non-rational. And in the final part of the essay, I discuss the issue of how we ought to conceive of the parts of the soul, and more specifically, whether we should think of them as agent-like parts, or in some other way. (shrink)

Plato’s partition argument infers that the soul has parts from the fact that the soul experiences mental conflict. We consider an ambiguity in the concept of mental conflict. According to the first sense of conflict, a soul is in conflict when it has desires whose satisfaction is logically incompatible. According to the second sense of conflict, a soul is in conflict when it has desires which are logically incompatible even when they are unsatisfied. This raises a dilemma: if the mental (...) conflict is supposed to be the latter kind of conflict, then the partition argument is valid but is likely unsound; if it’s supposed to be the former kind, then the partition argument has true premises but is invalid. We explain this dilemma in detail and defend a dispositionalist solution to it. (shrink)

This essay argues that Plato in the Republic needs an account of why and how the three distinct parts of the soul are parts of one soul, and it draws on the Phaedrus and Gorgias to develop an account of compositional unity that fits what is said in the Republic.

This paper considers the use that Plato makes of the Principle of Non-Contradiction in his engagements with eristic refutations. By examining Plato’s use of the principle in his most detailed engagements with eristic—in the Sophist, the discussion of “agonistic” argumentation in the Theaetetus, and especially the Euthydemus—I aim to show that the pressure exerted on Plato by eristic refutations played a crucial role in his development of the PNC, and that the principle provided him with a much more sophisticated means (...) of demarcating philosophical argumentation from eristic than he is generally thought to have. In particular, I argue that Plato’s qualified formulation of the PNC restricts the class of genuine contradictions in such a way that reveals the contradictions that eristics produce through their refutations to be merely apparent and that Plato consistently appeals to his qualified conception of genuine contradiction in his encounters with eristics in order to demonstrate that their refutations are merely apparent. The paper concludes by suggesting that the conception of genuine contradiction afforded by the PNC did not just provide Plato with a way of demarcating genuine from eristic refutations, but also with an answer to substantive philosophical challenges that eristics raised through their refutations. (shrink)

I argue that Plato’s account of hunger and thirst in Republic IV, 437d–439a uncovers a general feature of desire: desire has an unqualified and a qualified dimension. This proposal, which I call Two Dimensions, captures recognizable motivational phenomena: being hungry and aiming to determine what one is hungry for, or wanting to study and still figuring out what field it is that one wants to study. Two Dimensions is a fundamental contribution to the theory of desire. It is compatible, I (...) argue, with the better known premise that desire is for the good, because the objects of paradigmatic desires are inherently valuable. (shrink)

En la República Platón parece romper con el intelectualismo socrático al aceptar deseos independientes del bien. Sin embargo, esto no le impide seguir afirmando que el alma hace todo lo que hace en virtud del bien. Para resolver esta aparente contradicción en el presente artículo se insiste en la distinción entre deseos y valores. Los deseos, generados en las partes del alma, están apegados a sus objetos propios, pero los valores revisten estos deseos de imágenes del bien y otros elementos (...) cognitivos que los convierten en móviles aceptables de la acción en la unidad del alma, por lo que hay que distinguir una volición independiente del bien en las partes del alma y una volición que actúa sub specie boni en el contexto de un alma unitaria que ha de decidir entre deseos opuestos entre sí. (shrink)

This article examines the problem of mental partitioning and mental conflict in Han 漢 dynasty sources. It begins by outlining two Greek psychological models—the Platonic tripartite model and the Stoic monistic model—and explains the connection between the two psychological models and their differing descriptions of mental conflict. It then analyzes passages from a seldom discussed text, the _Extended Reflections_ (_Shenjian_ 申鑒), written by the Eastern Han thinker X un Yue 荀悅. A combined analysis of the _Extended Reflections_ with fragments from (...) other Han dynasty thinkers uncovers debates on mental partitioning and mental conflict that are in some ways analogous to those found in Greek philosophical literature. One view posits that the human psyche is composed of two parts capable of producing conflicting motivations. The other view sees all actions as stemming from a single psychological center. The conclusions of this article offer new perspectives on early Chinese moral psychology that have important implications for modern research on early Chinese philosophy. (shrink)