The Republic
latter becomes the subject of knowledge; beautiful too, as are both
truth and knowledge, you will be right in esteeming this other nature
as more beautiful than either; and, as in the previous instance, light
and sight may be truly said to be like the sun, and yet not to be the
sun, so in this other sphere, science and truth may be deemed to be
like the good, but not the good; the good has a place of honour yet
higher.
What a wonder of beauty that must be, he said, which is the author of
science and truth, and yet surpasses them in beauty; for you surely
cannot mean to say that pleasure is the good?
God forbid, I replied; but may I ask you to consider the image in
another point of view?
In what point of view?
You would say, would you not, that the sun is not only the author of
visibility in all visible things, but of generation and nourishment and
growth, though he himself is not generation?
Certainly.
In like manner the good may be said to be not only the author of
knowledge to all things known, but of their being and essence, and yet
the good is not essence, but far exceeds essence in dignity and power.
Glaucon said, with a ludicrous earnestness: By the light of heaven, how
amazing!
Yes, I said, and the exaggeration may be set down to you; for you made
me utter my fancies.
And pray continue to utter them; at any rate let us hear if there is
anything more to be said about the similitude of the sun.
Yes, I said, there is a great deal more.
Then omit nothing, however slight.
I will do my best, I said; but I should think that a great deal will
have to be omitted.
I hope not, he said.
You have to imagine, then, that there are two ruling powers, and that
one of them is set over the intellectual world, the other over the
visible. I do not say heaven, lest you should fancy that I am playing
upon the name (‘ourhanoz, orhatoz’). May I suppose that you have this
distinction of the visible and intelligible fixed in your mind?
I have.
Now take a line which has been cut into two unequal parts, and divide
each of them again in the same proportion, and suppose the two main
divisions to answer, one to the visible and the other to the
intelligible, and then compare the subdivisions in respect of their
clearness and want of clearness, and you will find that the first
section in the sphere of the visible consists of images. And by images
I mean, in the first place, shadows, and in the second place,
reflections in water and in solid, smooth and polished bodies and the
like: Do you understand?
Yes, I understand.
Imagine, now, the other section, of which this is only the resemblance,
to include the animals which we see, and everything that grows or is
made.
Very good.
Would you not admit that both the sections of this division have
different degrees of truth, and that the copy is to the original as the
sphere of opinion is to the sphere of knowledge?
Most undoubtedly.
Next proceed to consider the manner in which the sphere of the
intellectual is to be divided.
In what manner?
Thus:—There are two subdivisions, in the lower of which the soul uses
the figures given by the former division as images; the enquiry can
only be hypothetical, and instead of going upwards to a principle
descends to the other end; in the higher of the two, the soul passes
out of hypotheses, and goes up to a principle which is above
hypotheses, making no use of images as in the former case, but
proceeding only in and through the ideas themselves.
I do not quite understand your meaning, he said.
Then I will try again; you will understand me better when I have made
some preliminary remarks. You are aware that students of geometry,
arithmetic, and the kindred sciences assume the odd and the even and
the figures and three kinds of angles and the like in their several
branches of science; these are their hypotheses, which they and every
body are supposed to know, and therefore they do not deign to give any
account of them either to themselves or others; but they begin with
them, and go on until they arrive at last, and in a consistent manner,
at their conclusion?
Yes, he said, I know.
And do you not know also that although they make use of the visible
forms and reason about them, they are thinking not of these, but of the
ideals which they resemble; not of the figures which they draw, but of
the absolute square and the absolute diameter, and so on—the forms
which they draw or make, and which have shadows and reflections in
water of their own, are converted by them into images, but they are
really seeking to behold the things themselves, which can only be seen
with the eye of the mind?
That is true.
And of this kind I spoke as the intelligible, although in the search
after it the soul is compelled to use hypotheses; not ascending to a
first principle, because she is unable to rise above the region of
hypothesis, but employing the objects of which the shadows below are
resemblances in their turn as images, they having in relation to the
shadows and reflections of them a greater distinctness, and therefore a
higher value.
I understand, he said, that you are speaking of the province of
geometry and the sister arts.
And when I speak of the other division of the intelligible, you will
understand me to speak of that other sort of knowledge which reason
herself attains by the power of dialectic, using the hypotheses not as
first principles, but only as hypotheses—that is to say, as steps and
points of departure into a world which is above hypotheses, in order
that she may soar beyond them to the first principle of the whole; and
clinging to this and then to that which depends on this, by successive
steps she descends again without the aid of any sensible object, from
ideas, through ideas, and in ideas she ends.
I understand you, he replied; not perfectly, for you seem to me to be
describing a task which is really tremendous; but, at any rate, I
understand you to say that knowledge and being, which the science of
dialectic contemplates, are clearer than the notions of the arts, as
they are termed, which proceed from hypotheses only: these are also
contemplated by the understanding, and not by the senses: yet, because
they start from hypotheses and do not ascend to a principle, those who
contemplate them appear to you not to exercise the higher reason upon
them, although when a first principle is added to them they are
cognizable by the higher reason. And the habit which is concerned with
geometry and the cognate sciences I suppose that you would term
understanding and not reason, as being intermediate between opinion and
reason.
You have quite conceived my meaning, I said; and now, corresponding to
these four divisions, let there be four faculties in the soul—reason
answering to the highest, understanding to the second, faith (or
conviction) to the third, and perception of shadows to the last—and let
there be a scale of them, and let us suppose that the several faculties
have clearness in the same degree that their objects have truth.
I understand, he replied, and give my assent, and accept your
arrangement.
BOOK VII.
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 refuge 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, he said.
And suppose once more, that he is reluctantly dragged up a steep and
rugged ascent, and held fast until he is 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 all 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 said, 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.