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Thinker Archive

Plato

An introduction to Plato's dialogues, philosophical method, and enduring investigations of justice, knowledge, education, and the good.

Period

428 BCE348 BCE

Athenian Greek

Identity

Platonism · Classical Greek philosophy

Philosophical archive record

Known for

plato · greek-philosophy · justice · knowledge

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Knowledge Path

Quotation archive

Selected Quotes

Education isn't what some people declare it to be, namely, the putting of knowledge into souls that lack it, like putting sight into blind eyes. Rather, the power to learn is present in everyone's soul, and the instrument with which each learns is like an eye that cannot be turned from darkness to light without the whole body being turned.
Plato·Republic
The blame is his who chooses. God is blameless.
Plato·Republic
What provides truth to the objects of knowledge and the power of knowing to the knower is the form of the good. And though it is the cause of knowledge and truth, it is also an object of knowledge.
Plato·Republic
Beauty itself is alone with itself, single in nature, while all the beautiful things share in it in such a way that when others come to be or pass away, it neither grows nor diminishes nor suffers any change.
Plato·Symposium
The soul of the philosopher thinks that it must not resist this deliverance, and so it cultivates calmness and joy and smooths the way for the deliverer.
Plato·Phaedo
We should try to escape from earth to the dwelling of the gods as quickly as we can, and to escape is to become like God, so far as this is possible; and to become like God is to become righteous and holy and wise.
Plato·Theaetetus
The unexamined life is not worth living for a human being.
Plato (Socrates)·Apology
And now, I said, let me show in a figure how far our nature is enlightened or unenlightened: Behold! human beings living in an underground den, and at the entrance a fire.
Plato·Republic
Until philosophers rule as kings or those who are now called kings and leading men genuinely and adequately philosophize, that is, until political power and philosophy entirely coincide... cities will have no rest from evils.
Plato·Republic
He who from these ascending under the influence of true love, begins to perceive that beauty, is not far from the end. And the true order of going, or being led by another, to the things of love, is to begin from the beauties of earth and mount upwards for the sake of that other beauty, using these as steps only.
Plato·Symposium
Knowledge which is acquired under compulsion obtains no hold on the mind.
Plato·The Republic
The beginning of truth is to know the truth about ourselves.
Plato·Theaetetus
The happy are happy by the possession of good things.
Plato·Symposium
No harm can come to a good man, either in life or after death: the gods do not neglect the one who strives to be just.
Socrates·Apology
A virtue is an acquired human quality the possession and exercise of which tends to enable us to achieve those goods which are internal to practices and the lack of which effectively prevents us from achieving any such goods.
Alasdair MacIntyre·After Virtue

Biography

Plato was an Athenian philosopher active in the fourth century BCE. He was associated with Socrates and later founded the Academy. His surviving works are mostly dialogues, a literary and philosophical form that complicates any attempt to treat every speaker as Plato's final position.

Historical Context

Plato wrote after Athens' defeat in the Peloponnesian War and the execution of Socrates. Questions about political disorder, education, knowledge, and the formation of character shape many of his dialogues.

Core Ideas

Plato investigates justice, knowledge, love, education, the soul, and the relation between changing appearances and more stable objects of understanding. Interpretations differ over the status and development of the theory of Forms, so careful reading requires attention to individual dialogues.

Philosophy

Plato's philosophy uses dialogue, argument, myth, and dramatic setting. Its central demand is not passive acceptance of a doctrine but sustained inquiry into what makes a life, a city, or a judgment good.

Major Works

Important dialogues include Apology, Crito, Phaedo, Symposium, Republic, Theaetetus, and Laws. The Republic is especially influential for its examination of justice, education, political order, and philosophical rule.

Influence Today

Plato remains central to debates in metaphysics, ethics, political philosophy, education, and literary form. His influence includes later Platonist traditions as well as critical responses from Aristotle to contemporary philosophy.

Sources

See the Frontmatter sources and named translation. This page avoids treating dialogue excerpts as context-free Plato quotations.

Learning Path

Part of a Structured Collection

Love, Emotion & Connection: The Philosophy of Love, Emotions & Belonging

A structured learning path through the philosophy of love, emotion, loneliness, and belonging: from Plato's eros and Aristotle's friendship to the philosophy of emotion, the experience of isolation, and love in the age of AI.

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Epistemology & Theory of Knowledge: A Learning Path

A structured learning path through epistemology, from classical foundations to contemporary debates about knowledge, justification, and truth.

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Political Philosophy & Justice

A structured learning path through political philosophy and the theory of justice, from the great social contract thinkers to the most urgent contemporary debates about freedom, equality, democracy, and power.

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Ethics & Moral Wisdom

A structured learning path through moral philosophy, from the great ethical theories of duty, utility, and virtue to the practical art of making ethical decisions in everyday life.

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Understanding Reality

A learning path through truth, knowledge, reality, and perception — from Plato to existential philosophy.

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Understanding Yourself

A learning path through self-knowledge, identity, wisdom, and practical discernment — from Socrates to modern philosophy.

Continue learning path →

Ancient Wisdom

A learning path through foundational questions of flourishing, virtue, harmony, duty, and the art of living.

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Knowledge Network

Archive references

Sources

3 scholarly sources
  • 01
    PlatoBy Stanford Encyclopedia of PhilosophyConsult source
  • 02
    Plato's Ethics and Politics in The RepublicBy Stanford Encyclopedia of PhilosophyConsult source
  • 03
    RepublicBy Plato; translated by C. D. C. ReeveIndianapolis: Hackett, 2004.

Source and quality checks completed

Quality check completed 2026-07-22

Based on 3 scholarly sourcesLast updated 2026-07-22