Dialogues · Character

Theodorus

A Cyrenean geometer whose quiet authority draws Socrates and a visiting Eleatic stranger into the hardest questions of the day.

supporting

Also known as Theodorus the geometrician, Theodorus the Samian, Theodorus Disciples

First appearance: Theaetetus

As a supporting figure in Dialogues, Theodorus is not background color—the story leans on what they do once the chapter opens.

The geometrician who introduces Theaetetus to Socrates and participates in the early discussion.

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Theodorus is the host and catalyst of the late dialogues, a mathematician from Cyrene whose conversation with Socrates sets the stage for the Eleatic Stranger's interrogation of the Sophist. He is deferential but firm, willing to yield the floor yet insistent that the matter at hand deserves a proper answer. His role is to bridge the worlds of Socratic inquiry and Eleatic method, making him the hinge on which the dialogue's early momentum turns.

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See Theodorus in Theaetetus

Character Web

16 connections

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Relationship types

Other

Character groups

Extended Cast of Dialogues
Philosophers and Interlocutors

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Narrative arc

Story tension across the book.

Setup
Escalation
Breaking point

In this excerpt, the dramatic climax occurs when Erasistratus’s boastful praise of the Syracusan envoy’s immen…

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In the story

Theodorus appears across 5 companion beats. Open any chapter in the free preview to see the notes beside the text.

Theaetetus
The geometrician who introduces Theaetetus to Socrates and participates in the early discussion.
Introduction and Analysis
Interlocutor who engages with Socrates, expresses enjoyment of digressions, and is drawn into the debate about the flux doctrine.
Theaetetus
Mentioned as having been present earlier in the discussion, though not directly participating in this excerpt.
Sophist
Present as a companion, though not actively participating in the main discussion.
Sophist
Brings the Eleatic Stranger to the discussion and vouches for his philosophical nature.

Chapter companion notes

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See Theodorus in Theaetetus