And so we must take courage and attack our father’s theory here and now, or else, if any scruples prevent us from doing this, we must give the whole thing up.

But nothing in the world must prevent us.

Then I have a third little request to make of you.

You have only to utter it.

I said a while ago that I always have been too faint-hearted for the refutation of this theory, and so I am now.

Yes, so you did.

I am afraid that on account of what I have said you will think I am mad because I have at once reversed my position. You see it is for your sake that I am going to undertake the refutation, if I succeed in it.

I certainly shall not think you are doing anything improper if you proceed to your refutation and proof; so go ahead boldly, so far as that is concerned.

Well, what would be a good beginning of a perilous argument? Ah, my boy, I believe the way we certainly must take is this.

What way?

We must first examine the points which now seem clear, lest we may have fallen into some confusion about them and may therefore carelessly agree with one another, thinking that we are judging correctly.

Express your meaning more clearly.

It seems to me that Parmenides and all who ever undertook a critical definition of the number and nature of realities have talked to us rather carelessly.

How so?

Every one of them seems to tell us a story, as if we were children. One says there are three principles, that some of them are sometimes waging a sort of war with each other, and sometimes become friends and marry and have children and bring them up; and another says there are two, wet and dry or hot and cold, which he settles together and unites in marriage. This refers apparently to Pherecydes and the early lonians. And the Eleatic sect in our region, beginning with Xenophanes and even earlier, have their story that all things, as they are called, are really one. Then some Ionian Heracleitus and his followers. and later some Sicilian Empedocles and his disciples. Muses reflected that it was safest to combine the two tales and to say that being is many and one, and is (or are) held together by enmity and friendship.

For the more strenuous Muses say it is always simultaneously coming together and separating; but the gentler ones relaxed the strictness of the doctrine of perpetual strife; they say that the all is sometimes one and friendly, under the influence of Aphrodite, and sometimes many and at variance with itself by reason of some sort of strife. Now whether any of them spoke the truth in all this, or not, it is harsh and improper to impute to famous men of old such a great wrong as falsehood. But one assertion can be made without offence.

What is that?

That they paid too little attention and consideration to the mass of people like ourselves. For they go on to the end, each in his own way, without caring whether their arguments carry us along with them, or whether we are left behind.

What do you mean?

When one of them says in his talk that many, or one, or two are, or have become, or are becoming, and again speaks of hot mingling with cold, and in some other part of his discourse suggests separations and combinations, for heaven’s sake, Theaetetus, do you ever understand what they mean by any of these things? I used to think, when I was younger, that I understood perfectly whenever anyone used this term not-being, which now perplexes us. But you see what a slough of perplexity we are in about it now.

Yes, I see.

And perhaps our minds are in this same condition as regards being also; we may think that it is plain sailing and that we understand when the word is used, though we are in difficulties about not-being, whereas really we understand equally little of both.

Perhaps.

And we may say the same of all the subjects about which we have been speaking.

Certainly.

We will consider most of them later, if you please, but now the greatest and foremost chief of them must be considered.

What do you mean? Or, obviously, do you mean that we must first investigate the term being, and see what those who use it think it signifies?

You have caught my meaning at once, Theaetetus. For I certainly do mean that this is the best method for us to use, by questioning them directly, as if they were present in person; so here goes: Come now, all you who say that hot and cold or any two such principles are the universe, what is this that you attribute to both of them when you say that both and each are? What are we to understand by this being (or are) of yours? Is this a third principle besides those two others, and shall we suppose that the universe is three, and not two any longer, according to your doctrine? For surely when you call one only of the two being you do not mean that both of them equally are; for in both cases In both cases, i.e. whether you say that one only is or that both are, they would both be one, namely being. they would pretty certainly be one and not two.

True.

Well, then, do you wish to call both of them together being?

Perhaps.

But, friends, we will say, even in that way you would very clearly be saying that the two are one.

You are perfectly right.

Then since we are in perplexity, do you tell us plainly what you wish to designate when you say being. For it is clear that you have known this all along, whereas we formerly thought we knew, but are now perplexed. So first give us this information, that we may not think we understand what you say, when the exact opposite is the case.— If we speak in this way and make this request of them and of all who say that the universe is more than one, shall we, my boy, be doing anything improper?

Not in the least.

Well then, must we not, so far as we can, try to learn from those who say that the universe is one The Eleatic Zeno and his school. what they mean when they say being?

Of course we must.

Then let them answer this question: Do you say that one only is? We do, they will say; will they not?

Yes.

Well then, do you give the name of being to anything?

Yes.

Is it what you call one, using two names for the same thing, or how is this?

What is their next answer, Stranger?

It is plain, Theaetetus, that he who maintains their theory will not find it the easiest thing in the world to reply to our present question or to any other.

Why not?

It is rather ridiculous to assert that two names exist when you assert that nothing exists but unity.

Of course it is.

And in general there would be no sense in accepting the statement that a name has any existence.

Why?

Because he who asserts that the name is other than the thing, says that there are two entities.

Yes.

And further, if he asserts that the name is the same as the thing, he will be obliged to say that it is the name of nothing, or if he says it is the name of something, the name will turn out to be the name of a name merely and of nothing else.

True.

And the one will turn out to be the name of one and also the one of the name. In other words, one, considered as a word, will be the name of unity, but considered as a reality, it will be the unity of which the word one is the name. The sentence is made somewhat difficult of comprehension, doubtless for the purpose of indicating the confusion caused by the identification of the name wlth the thing.

Necessarily.

And will they say that the whole is other than the one which exists or the same with it?

Of course they will and do say it is the same.

If then the whole is, as Parmenides says,On all sides like the mass of a well-rounded sphere, equally weighted in every direction from the middle; for neither greater nor less must needs be on this or that,Parmenides Fr. 8.43then being, being such as he describes it, has a center and extremes, and, having these, must certainly have parts, must it not?

Certainly.