Trivium
Plato's Republic: What is Justice?Grade 9rhetoric Stage

Justice in the Soul

The city is complete, and Socrates now searches for the four cardinal virtues within it. Wisdom belongs to the guardians (the smallest class who know what is good for the whole); courage belongs to the auxiliaries (who preserve right opinion about what to fear); temperance is harmony among all classes (agreement about who should rule). But what is justice? It is each part doing its own work and not meddling with others' functions - the principle of specialization applied to the whole. Now Socrates applies this to the individual soul, which has three parts: reason (logistikon), spirit (thymos), and appetite (epithymia). Justice in the soul is the same as in the city: each part performing its function under the rule of reason. This is Socrates' answer to Thrasymachus: the just person is not just because of external rewards or fear of punishment, but because their soul is healthy and harmonious.

The Text

What You'll Learn

1

Comprehension

Lists the four virtues and where they are found: wisdom (guardians), courage (auxiliaries), temperance (all), justice (structure)

2

Cause & Consequence

Explains why city and soul have the same structure: both are wholes with parts that must harmonize

3

Meaning

Takes a position on whether this successfully answers the Ring of Gyges challenge

4

Evidence

Cites a specific passage about justice in the soul or the answer to Thrasymachus

5

Defense

Maintains or thoughtfully revises position under challenge

6

Craft

Analyzes how the city-building of Books II-III pays off in Book IV's answer

How It Works

Your AI tutor will guide you through this text using the Socratic method. Instead of giving you answers, it asks questions that help you discover the meaning for yourself.

  • 1.Read the text carefully
  • 2.Answer the tutor's questions in your own words
  • 3.Progress through each stage as you demonstrate understanding
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