Plato

The Allegory of the Cave

Plot

Imagine prisoners, who have been chained since their childhood deep inside a cave: not only are their limbs immobilized by the chains; their heads are chained in one direction as well, so that their gaze is fixed on a wall.

Behind the prisoners is an enormous fire, and between the fire and the prisoners is a raised walkway, along which statues of various animals, plants, and other things are carried by people. The statues cast shadows on the wall, and the prisoners watch these shadows. When one of the statue-carriers speaks, an echo against the wall causes the prisoners to believe that the words come from the shadows.

The prisoners engage in what appears to us to be a game: naming the shapes as they come by. This, however, is the only reality that they know, even though they are seeing merely shadows of images. They are thus conditioned to judge the quality of one another by their skill in quickly naming the shapes and dislike those who play poorly.

Suppose a prisoner is released and compelled to stand up and turn around. At that moment his eyes will be blinded by the sunlight coming into the cave from its entrance, and the shapes passing by will appear less real than their shadows.

The last object he would be able to see is the sun, which, in time, he would learn to see as the object that provides the seasons and the courses of the year, presides over all things in the visible region, and is in some way the cause of all these things that he has seen.

(This part of the allegory, incidentally, closely matches Plato's metaphor of the sun which occurs near the end of The Republic, Book VI.)[1]

Once enlightened, so to speak, the freed prisoner would not want to return to the cave to free "his fellow bondsmen," but would be compelled to do so. Another problem lies in the other prisoners not wanting to be freed: descending back into the cave would require that the freed prisoner's eyes adjust again, and for a time, he would be one of the ones identifying shapes on the wall. His eyes would be swamped by the darkness, and would take time to become acclimated. Therefore, he would not be able to identify the shapes on the wall as well as the other prisoners, making it seem as if his being taken to the surface completely ruined his eyesight. (The Republic bk. VII, 516b-c; trans. Paul Shorey).[2]

Some background:

The son of a wealthy and noble family, Plato (427-347 B.C.) was preparing for a career in politics when the trial and eventual execution of Socrates (399 B.C.) changed the course of his life. He abandoned his political career and turned to philosophy, opening a school on the outskirts of Athens dedicated to the Socratic search for wisdom. Plato's school, then known as the Academy, was the first university in western history and operated from 387 B.C. until A.D. 529, when it was closed by Justinian.

Unlike his mentor Socrates, Plato was both a writer and a teacher. His writings are in the form of dialogues, with Socrates as the principal speaker. In the Allegory of the Cave, Plato described symbolically the predicament in which mankind finds itself and proposes a way of salvation. The Allegory presents, in brief form, most of Plato's major philosophical assumptions: his belief that the world revealed by our senses is not the real world but only a poor copy of it, and that the real world can only be apprehended intellectually; his idea that knowledge cannot be transferred from teacher to student, but rather that education consists in directing student's minds toward what is real and important and allowing them to apprehend it for themselves; his faith that the universe ultimately is good; his conviction that enlightened individuals have an obligation to the rest of society, and that a good society must be one in which the truly wise (the Philosopher-King) are the rulers.

The Allegory of the Cave can be found in Book VII of Plato's best-known work, The Republic, a lengthy dialogue on the nature of justice. Often regarded as a utopian blueprint, The Republic is dedicated toward a discussion of the education required of a Philosopher-King.

Further notes and interpretation:

  1. Plato realizes that the general run of humankind can think, and speak, etc., without (so far as they acknowledge) any awareness of his realm of Forms.
  2. The allegory of the cave is supposed to explain this.
  3. In the allegory, Plato likens people untutored in the Theory of Forms to prisoners chained in a cave, unable to turn their heads. All they can see is the wall of the cave. Behind them burns a fire. Between the fire and the prisoners there is a parapet, along which puppeteers can walk. The puppeteers, who are behind the prisoners, hold up puppets that cast shadows on the wall of the cave. The prisoners are unable to see these puppets, the real objects, that pass behind them. What the prisoners see and hear are shadows and echoes cast by objects that they do not see. Here is an illustration of Plato’s Cave:

From Great Dialogues of Plato: Complete Texts of the Republic, Apology, Crito Phaido, Ion, and Meno, Vol. 1. (Warmington and Rouse, eds.) New York, Signet Classics: 1999. p. 316.

  1. Such prisoners would mistake appearance for reality. They would think the things they see on the wall (the shadows) were real; they would know nothing of the real causes of the shadows.
  2. So when the prisoners talk, what are they talking about? If an object (a book, let us say) is carried past behind them, and it casts a shadow on the wall, and a prisoner says “I see a book,” what is he talking about?

He thinks he is talking about a book, but he is really talking about a shadow. But he uses the word “book.” What does that refer to?

  1. Plato gives his answer at line (515b2). The text here has puzzled many editors, and it has been frequently emended. The translation in Grube/Reeve gets the point correctly:

“And if they could talk to one another, don’t you think they’d suppose that the names they used applied to the things they see passing before them?”

  1. Plato’s point is that the prisoners would be mistaken. For they would be taking the terms in their language to refer to the shadows that pass before their eyes, rather than (as is correct, in Plato’s view) to the real things that cast the shadows.

If a prisoner says “That’s a book” he thinks that the word “book” refers to the very thing he is looking at. But he would be wrong. He’s only looking at a shadow. The real referent of the word “book” he cannot see. To see it, he would have to turn his head around.

  1. Plato’s point: the general terms of our language are not “names” of the physical objects that we can see. They are actually names of things that we cannot see, things that we can only grasp with the mind.
  2. When the prisoners are released, they can turn their heads and see the real objects. Then they realize their error. What can we do that is analogous to turning our heads and seeing the causes of the shadows? We can come to grasp the Forms with our minds.
  3. Plato’s aim in the Republic is to describe what is necessary for us to achieve this reflective understanding. But even without it, it remains true that our very ability to think and to speak depends on the Forms. For the terms of the language we use get their meaning by “naming” the Forms that the objects we perceive participate in.
  4. The prisoners may learn what a book is by their experience with shadows of books. But they would be mistaken if they thought that the word “book” refers to something that any of them has ever seen.

Likewise, we may acquire concepts by our perceptual experience of physical objects. But we would be mistaken if we thought that the concepts that we grasp were on the same level as the things we perceive.

A few points to think about are below. Write a few points about each:

  1. What is a utopia? How might a utopian society be defined? Make a list of characteristics.
  2. Plato suggested that there are 3 types of people: the philosopher, the hedonist (pleasure seeker), and the man of action. Respond- agree or disagree? How might people fall into these 3 categories?
  3. Comment of the nature and limits of human knowledge.
  4. What is your interpretation of the piece? What is the overall message that Plato is sending?