Come, then, and let us think of something to say to him. Shall we begin by assuring him that he is welcome to any knowledge which he may have, and that we are rejoiced at his having it? But we should like to ask him a question: Does he who has knowledge know something or nothing? (You must answer for him.)
I answer that he knows something.
Something that is or is not?
Something that is; for how can that which is not ever be known?
And are we assured, after looking at the matter from many points of view, that absolute being is or may be absolutely known, but that the utterly non-existent is utterly unknown?
Nothing can be more certain.
Good. But if there be anything which is of such a nature as to be and not to be, that will have a place intermediate between pure being and the absolute negation of being?
Yes, between them.
And, as knowledge corresponded to being and ignorance of necessity to not-being, for that intermediate between being and not-being there has to be discovered a corresponding intermediate between ignorance and knowledge, if there be such?
Certainly.
Do we admit the existence of opinion?
Undoubtedly.
As being the same with knowledge, or another faculty?
Another faculty.
Then opinion and knowledge have to do with different kinds of matter corresponding to this difference of faculties?
Yes.
And knowledge is relative to being and knows being. But before I proceed further I will make a division.
What division?
I will begin by placing faculties in a class by themselves: they are powers in us, and in all other things, by which we do as we do. Sight and hearing, for example, I should call faculties. Have I clearly explained the class which I mean?
Yes, I quite understand.
Then let me tell you my view about them. I do not see them, and therefore the distinctions of figure, colour, and the like, which enable me to discern the differences of some things, do not apply to them. In speaking of a faculty I think only of its sphere and its result; and that which has the same sphere and the same result I call the same faculty, but that which has another sphere and another result I call different. Would that be your way of speaking?
Yes.
And will you be so very good as to answer one more question? Would you say that knowledge is a faculty, or in what class would you place it?
Certainly knowledge is a faculty, and the mightiest of all faculties.
And is opinion also a faculty?
Certainly, he said; for opinion is that with which we are able to form an opinion.
And yet you were acknowledging a little while ago that knowledge is not the same as opinion?
Why, yes, he said: how can any reasonable being ever identify that which is infallible with that which errs?
An excellent answer, proving, I said, that we are quite conscious of a distinction between them.
Yes.
Then knowledge and opinion having distinct powers have also distinct spheres or subject-matters?
That is certain.
Being is the sphere or subject-matter of knowledge, and knowledge is to know the nature of being?
Yes.
And opinion is to have an opinion?
Yes.
And do we know what we opine? or is the subject-matter of opinion the same as the subject-matter of knowledge?
Nay, he replied, that has been already disproven; if difference in faculty implies difference in the sphere or subject-matter, and if, as we were saying, opinion and knowledge are distinct faculties, then the sphere of knowledge and of opinion cannot be the same.
Then if being is the subject-matter of knowledge, something else must be the subject-matter of opinion?
Yes, something else.
Well then, is not-being the subject-matter of opinion? or, rather, how can there be an opinion at all about not-being? Reflect: when a man has an opinion, has he not an opinion about something? Can he have an opinion which is an opinion about nothing?
Impossible.
He who has an opinion has an opinion about some one thing?
Yes.
And not-being is not one thing but, properly speaking, nothing?
True.
Of not-being, ignorance was assumed to be the necessary correlative; of being, knowledge?
True, he said.
Then opinion is not concerned either with being or with not-being?
Not with either.
And can therefore neither be ignorance nor knowledge?
That seems to be true.
But is opinion to be sought without and beyond either of them, in a greater clearness than knowledge, or in a greater darkness than ignorance?
In neither.
Then I suppose that opinion appears to you to be darker than knowledge, but lighter than ignorance?
Both; and in no small degree.
And also to be within and between them?
Yes.
Then you would infer that opinion is intermediate?
No question.
But were we not saying before, that if anything appeared to be of a sort which is and is not at the same time, that sort of thing would appear also to lie in the interval between pure being and absolute not-being; and that the corresponding faculty is neither knowledge nor ignorance, but will be found in the interval between them?
True.
And in that interval there has now been discovered something which we call opinion?
There has.
Then what remains to be discovered is the object which partakes equally of the nature of being and not-being, and cannot rightly be termed either, pure and simple; this unknown term, when discovered, we may truly call the subject of opinion, and assign each to their proper faculty,—the extremes to the faculties of the extremes and the mean to the faculty of the mean.
True.
This being premised, I would ask the gentleman who is of opinion that there is no absolute or unchangeable idea of beauty—in whose opinion the beautiful is the manifold—he, I say, your lover of beautiful sights, who cannot bear to be told that the beautiful is one, and the just is one, or that anything is one—to him I would appeal, saying, Will you be so very kind, sir, as to tell us whether, of all these beautiful things, there is one which will not be found ugly; or of the just, which will not be found unjust; or of the holy, which will not also be unholy?
No, he replied; the beautiful will in some point of view be found ugly; and the same is true of the rest.
And may not the many which are doubles be also halves?—doubles, that is, of one thing, and halves of another?
Quite true.
And things great and small, heavy and light, as they are termed, will not be denoted by these any more than by the opposite names?
True; both these and the opposite names will always attach to all of them.
And can any one of those many things which are called by particular names be said to be this rather than not to be this?
He replied: They are like the punning riddles which are asked at feasts or the children’s puzzle about the eunuch aiming at the bat, with what he hit him, as they say in the puzzle, and upon what the bat was sitting. The individual objects of which I am speaking are also a riddle, and have a double sense: nor can you fix them in your mind, either as being or not-being, or both, or neither.
Then what will you do with them? I said. Can they have a better place than between being and not-being? For they are clearly not in greater darkness or negation than not-being, or more full of light and existence than being.
That is quite true, he said.
Thus then we seem to have discovered that the many ideas which the multitude entertain about the beautiful and about all other things are tossing about in some region which is half-way between pure being and pure not-being?
We have.
Yes; and we had before agreed that anything of this kind which we might find was to be described as matter of opinion, and not as matter of knowledge; being the intermediate flux which is caught and detained by the intermediate faculty.
Quite true.
Then those who see the many beautiful, and who yet neither see absolute beauty, nor can follow any guide who points the way thither; who see the many just, and not absolute justice, and the like,—such persons may be said to have opinion but not knowledge?
That is certain.
But those who see the absolute and eternal and immutable may be said to know, and not to have opinion only?
Neither can that be denied.
The one love and embrace the subjects of knowledge, the other those of opinion? The latter are the same, as I dare say you will remember, who listened to sweet sounds and gazed upon fair colours, but would not tolerate the existence of absolute beauty.
Yes, I remember.
Shall we then be guilty of any impropriety in calling them lovers of opinion rather than lovers of wisdom, and will they be very angry with us for thus describing them?
I shall tell them not to be angry; no man should be angry at what is true.
But those who love the truth in each thing are to be called lovers of wisdom and not lovers of opinion.
Assuredly.
BOOK VI.
And thus, Glaucon, after the argument has gone a weary way, the true and the false philosophers have at length appeared in view.
I do not think, he said, that the way could have been shortened.
I suppose not, I said; and yet I believe that we might have had a better view of both of them if the discussion could have been confined to this one subject and if there were not many other questions awaiting us, which he who desires to see in what respect the life of the just differs from that of the unjust must consider.
And what is the next question? he asked.
Surely, I said, the one which follows next in order. Inasmuch as
