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The
Allegory of the Cave
by Plato
[Ed.
Note: Plato is a realist concerning universals and
says that these terms stand for what a number of
particular things have in common. And it is this
common element that we refer to as a
universal. Unlike some realists, Plato
thinks that these universals exist eternally in a
nontemporal, nonspatial realm independent of our
space-time world. He argues for the unique
existence of these universals, or Ideas, this way.
(1) We have knowledge of objects, such as perfect
circles, that cannot be based on anything we have
sensed. (2) Knowledge must have an object. (3)
Therefore, there must exist some other entities
(the Ideas) distinct from those of the senses.
Among the passages in Plato's Republic which
present his thoughts on this subject, the "Allegory
of the Cave" is one of the most famous. Here,
Socrates is speaking to a group of people and
Glaucon is his interlocutor.]
And now, I said, let me show in a figure how far
our nature is enlightened or
unenlightened:--Behold! human beings living in a
underground den, which has a mouth open towards the
light and reaching all along the den; here they
have been from their childhood, and have their legs
and necks chained so that they cannot move, and can
only see before them, being prevented by the chains
from turning round their heads. Above and behind
them a fire is blazing at a distance, and between
the fire and the prisoners there is a raised way;
and you will see, if you look, a low wall built
along the way, like the screen which marionette
players have in front of them, over which they show
the puppets.
I see.
And do you see, I said, men passing along the
wall carrying all sorts of vessels, and statues and
figures of animals made of wood and stone and
various materials, which appear over the wall? Some
of them are talking, others silent.
You have shown me a strange image, and they are
strange prisoners.
Like ourselves, I replied; and they see only
their own shadows, or the shadows of one another,
which the fire throws on the opposite wall of the
cave?
True, he said; how could they see anything but
the shadows if they were never allowed to move
their heads?
And of the objects which are being carried in
like manner they would only see the shadows?
Yes, he said.
And if they were able to converse with one
another, would they not suppose that they were
naming what was actually before them?
Very true.
And suppose further that the prison had an echo
which came from the other side, would they not be
sure to fancy when one of the passers-by spoke that
the voice which they heard came from the passing
shadow?
No question, he replied.
To them, I said, the truth would be literally
nothing but the shadows of the images.
That is certain.
And now look again, and see what will naturally
follow if the prisoners are released and disabused
of their error. At first, when any of them is
liberated and compelled suddenly to stand up and
turn his neck round and walk and look towards the
light, he will suffer sharp pains; the glare will
distress him, and he will be unable to see the
realities of which in his former state he had seen
the shadows; and then conceive some one saying to
him, that what he saw before was an illusion, but
that now, when he is approaching nearer to being
and his eye is turned towards more real existence,
he has a clearer vision, -what will be his reply?
And you may further imagine that his instructor is
pointing to the objects as they pass and requiring
him to name them, -will he not be perplexed? Will
he not fancy that the shadows which he formerly saw
are truer than the objects which are now shown to
him?
Far truer.
And if he is compelled to look straight at the
light, will he not have a pain in his eyes which
will make him turn away to take and take in the
objects of vision which he can see, and which he
will conceive to be in reality clearer than the
things which are now being shown to him?
True.
And suppose once more, that he is reluctantly
dragged up a steep and rugged ascent, and held fast
until he's forced into the presence of the sun
himself, is he not likely to be pained and
irritated? When he approaches the light his eyes
will be dazzled, and he will not be able to see
anything at all of what are now called
realities.
Not all in a moment, he said.
He will require to grow accustomed to the sight
of the upper world. And first he will see the
shadows best, next the reflections of men and other
objects in the water, and then the objects
themselves; then he will gaze upon the light of the
moon and the stars and the spangled heaven; and he
will see the sky and the stars by night better than
the sun or the light of the sun by day?
Certainly.
Last of he will be able to see the sun, and not
mere reflections of him in the water, but he will
see him in his own proper place, and not in
another; and he will contemplate him as he is.
Certainly.
He will then proceed to argue that this is he
who gives the season and the years, and is the
guardian of all that is in the visible world, and
in a certain way the cause of all things which he
and his fellows have been accustomed to behold?
Clearly, he would first see the sun and then
reason about him.
And when he remembered his old habitation, and
the wisdom of the den and his fellow-prisoners, do
you not suppose that he would felicitate himself on
the change, and pity them?
Certainly, he would.
And if they were in the habit of conferring
honours among themselves on those who were quickest
to observe the passing shadows and to remark which
of them went before, and which followed after, and
which were together; and who were therefore best
able to draw conclusions as to the future, do you
think that he would care for such honours and
glories, or envy the possessors of them? Would he
not say with Homer,
- Better to be the poor servant of a poor
master,
and to endure anything, rather than think as
they do and live after their manner?
Yes, he said, I think that he would rather
suffer anything than entertain these false notions
and live in this miserable manner.
Imagine once more, I said, such an one coming
suddenly out of the sun to be replaced in his old
situation; would he not be certain to have his eyes
full of darkness?
To be sure, he said.
And if there were a contest, and he had to
compete in measuring the shadows with the prisoners
who had never moved out of the den, while his sight
was still weak, and before his eyes had become
steady (and the time which would be needed to
acquire this new habit of sight might be very
considerable) would he not be ridiculous? Men would
say of him that up he went and down he came without
his eyes; and that it was better not even to think
of ascending; and if any one tried to loose another
and lead him up to the light, let them only catch
the offender, and they would put him to death.
No question, he said.
This entire allegory, I said, you may now
append, dear Glaucon, to the previous argument; the
prison-house is the world of sight, the light of
the fire is the sun, and you will not misapprehend
me if you interpret the journey upwards to be the
ascent of the soul into the intellectual world
according to my poor belief, which, at your desire,
I have expressed whether rightly or wrongly God
knows. But, whether true or false, my opinion is
that in the world of knowledge the idea of good
appears last of all, and is seen only with an
effort; and, when seen, is also inferred to be the
universal author of all things beautiful and right,
parent of light and of the lord of light in this
visible world, and the immediate source of reason
and truth in the intellectual; and that this is the
power upon which he who would act rationally,
either in public or private life must have his eye
fixed.
I agree, he said, as far as I am able to
understand you.
Moreover, I said, you must not wonder that those
who attain to this beatific vision are unwilling to
descend to human affairs; for their souls are ever
hastening into the upper world where they desire to
dwell; which desire of theirs is very natural, if
our allegory may be trusted.
Yes, very natural.
And is there anything surprising in one who
passes from divine contemplations to the evil state
of man, misbehaving himself in a ridiculous manner;
if, while his eyes are blinking and before he has
become accustomed to the surrounding darkness, he
is compelled to fight in courts of law, or in other
places, about the images or the shadows of images
of justice, and is endeavouring to meet the
conceptions of those who have never yet seen
absolute justice?
Anything but surprising, he replied.
Any one who has common sense will remember that
the bewilderments of the eyes are of two kinds, and
arise from two causes, either from coming out of
the light or from going into the light, which is
true of the mind's eye, quite as much as of the
bodily eye; and he who remembers this when he sees
any one whose vision is perplexed and weak, will
not be too ready to laugh; he will first ask
whether that soul of man has come out of the
brighter light, and is unable to see because
unaccustomed to the dark, or having turned from
darkness to the day is dazzled by excess of light.
And he will count the one happy in his condition
and state of being, and he will pity the other; or,
if he have a mind to laugh at the soul which comes
from below into the light, there will be more
reason in this than in the laugh which greets him
who returns from above out of the light into the
den.
That, he said, is a very just distinction.
But then, if I am right, certain professors of
education must be wrong when they say that they can
put a knowledge into the soul which was not there
before, like sight into blind eyes.
They undoubtedly say this, he replied.
Whereas, our argument shows that the power and
capacity of learning exists in the soul already;
and that just as the eye was unable to turn from
darkness to light without the whole body, so too
the instrument of knowledge can only by the
movement of the whole soul be turned from the world
of becoming into that of being, and learn by
degrees to endure the sight of being, and of the
brightest and best of being, or in other words, of
the good.
Excerpted from Book VII of
The Republic, by Plato (Jowett trans.
1894).
Biography in
The Radical Academy: Plato
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Republic, by Plato
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