You can want something and also think you should refuse it. Plato makes that conflict a starting point for asking what a person is. In the Republic, the example is thirst: someone wants a drink but holds back. The conversation asks whether the desire and the refusal come from different sources within the person (Book IV, 439b–d).
That is an argument to examine, not a brain scan. Its force depends on whether different motivations really require different parts of a soul.
A writer who gives others the floor
Plato was an Athenian philosopher, born around 429 BCE and died in 347 BCE in the chronology used by Richard Kraut. The birth date is uncertain. He founded the Academy, and Aristotle studied with him (Kraut, introduction; IEP, biography).
Many dialogues give Socrates the leading voice, but a character’s speech is not automatically a transcript of the historical Socrates. Kraut explains the difficulty of separating Plato’s thinking from the voices he creates. Reading the speaker, setting and objections is part of understanding the argument.
Three sources of motivation
In Republic IV, the conversation distinguishes reason, appetite and spirit. Appetite includes hunger and thirst. Reason considers what to do. Spirit appears in anger, indignation and the wish to defend what someone regards as right (436a–441c).
The dialogue tests the distinction through examples. After the thirsty person, Socrates tells a story about Leontius, who wants to look at bodies near an execution site while also feeling disgust and anger at his desire (439e–440a). The story is Documented in the dialogue, not independently confirmed as an event.
The example gives spirit a role that cannot simply be replaced by the word “emotion.” Here anger can oppose an appetite. The question is about conflicting motivations inside one person, rather than three separate people occupying a body.
Why a city enters the argument
The Republic compares these motivations with an imagined city containing rulers, defenders and producers. Its account of justice asks each part to do its own work. Its account of moderation emphasizes agreement about which part should rule (430d–434c; 441d–444a).
Those are connected but different ideas, and summaries often blur them. The dialogue’s picture is hierarchical: reason should guide the person, just as the city’s rulers should govern. Describing that proposal does not require accepting it as a fair arrangement for society.
The chariot is another presentation
In the Phaedrus, Socrates offers an image of the soul: a charioteer with two winged horses. In the human team, one horse is more responsive to guidance and the other difficult to control. The passage presents a likeness rather than claiming to show the soul’s exact nature (246a–b; 253c–254e).
The image develops within a discussion of love and beauty. It should not be turned into a literal anatomical diagram, or treated as though it repeats every part of the Republic’s city comparison. Documented here means that Plato’s text uses the image; interpreting all its details takes a further argument.
A body map in the Timaeus
The Timaeus supplies the bodily locations that summaries often attach to every Platonic work. Its account places the divine, ruling element in the head, the spirited part between neck and diaphragm, and appetite between diaphragm and navel (69c–71a). “In the stomach” is less precise than the passage.
This creation account distinguishes an immortal principle from mortal forms of soul. That complicates the claim that Plato always describes every part as one eternal, disembodied occupant. Different dialogues need to be read separately before they are combined into a single system.
What happens after death?
The Phaedo makes survival after death a central question. Socrates argues that life and death arise from one another, and the conversation also connects learning with recollection of knowledge acquired before birth (70c–77a). These are Documented philosophical arguments, not confirmed reports of rebirth.
Earlier Pythagorean traditions also concerned themselves with survival after death. Plato was entering an existing discussion, not beginning from a Greek world with no competing ideas about the soul (Hendrik Lorenz, §2).
A narrower connection with Freud
Freud explicitly compared Plato’s Eros, or love, with psychoanalytic libido in Group Psychology and the Analysis of the Ego (chapter IV, Strachey translation). That gives us a specific later engagement with Plato.
It does not establish the popular claim that id, ego and superego were directly copied from appetite, reason and spirit. That proposed one-to-one origin remains Unknown here. A resemblance needs evidence before it becomes a history of borrowing.
How we know
What survives. Dialogues with identifiable arguments, images and speakers, plus later readers’ writings.
Whose voices are missing. The dialogues do not independently establish what all Greeks believed.
What remains uncertain. Exact composition dates and how far particular passages express Plato’s final position.
Then vs. now
Then: Questions about motivation were also questions about justice, education, love and survival after death.
Now: Keeping those questions distinct lets us assess the arguments without turning them into modern diagnoses or anatomy.