What do you mean?

I mean, as I was just now saying, and as I am sure that you know, that those things which are possessed by the number three must not only be three in number, but must also be odd.

Quite true.

And on this oddness, of which the number three has the impress, the opposite idea will never intrude?

No.

And this impress was given by the odd principle?

Yes.

And to the odd is opposed the even?

True.

Then the idea of the even number will never arrive at three?

No.

Then three has no part in the even?

None.

Then the triad or number three is uneven?

Very true.

To return then to my distinction of natures which are not opposed, and yet do not admit opposites--as, in the instance given, three, although not opposed to the even, does not any the more admit of the even, but always brings the opposite into play on the other side; or as two does not receive the odd, or fire the cold--from these examples (and there are many more of them) perhaps you may be able to arrive at the general conclusion, that not only opposites will not receive opposites, but also that nothing which brings the opposite will admit the opposite of that which it brings, in that to which it is brought. And here let me recapitulate--for there is no harm in repet.i.tion. The number five will not admit the nature of the even, any more than ten, which is the double of five, will admit the nature of the odd. The double has another opposite, and is not strictly opposed to the odd, but nevertheless rejects the odd altogether. Nor again will parts in the ratio 3:2, nor any fraction in which there is a half, nor again in which there is a third, admit the notion of the whole, although they are not opposed to the whole: You will agree?

Yes, he said, I entirely agree and go along with you in that.

And now, he said, let us begin again; and do not you answer my question in the words in which I ask it: let me have not the old safe answer of which I spoke at first, but another equally safe, of which the truth will be inferred by you from what has been just said. I mean that if any one asks you 'what that is, of which the inherence makes the body hot,' you will reply not heat (this is what I call the safe and stupid answer), but fire, a far superior answer, which we are now in a condition to give. Or if any one asks you 'why a body is diseased,' you will not say from disease, but from fever; and instead of saying that oddness is the cause of odd numbers, you will say that the monad is the cause of them: and so of things in general, as I dare say that you will understand sufficiently without my adducing any further examples.

Yes, he said, I quite understand you.

Tell me, then, what is that of which the inherence will render the body alive?

The soul, he replied.

And is this always the case?

Yes, he said, of course.

Then whatever the soul possesses, to that she comes bearing life?

Yes, certainly.

And is there any opposite to life?

There is, he said.

And what is that?

Death.

Then the soul, as has been acknowledged, will never receive the opposite of what she brings.

Impossible, replied Cebes.

And now, he said, what did we just now call that principle which repels the even?

The odd.

And that principle which repels the musical, or the just?

The unmusical, he said, and the unjust.

And what do we call the principle which does not admit of death?

The immortal, he said.

And does the soul admit of death?

No.

Then the soul is immortal?

Yes, he said.

And may we say that this has been proven?

Yes, abundantly proven, Socrates, he replied.

Supposing that the odd were imperishable, must not three be imperishable?

Of course.

And if that which is cold were imperishable, when the warm principle came attacking the snow, must not the snow have retired whole and unmelted--for it could never have perished, nor could it have remained and admitted the heat?

True, he said.

Again, if the uncooling or warm principle were imperishable, the fire when a.s.sailed by cold would not have perished or have been extinguished, but would have gone away unaffected?

Certainly, he said.

And the same may be said of the immortal: if the immortal is also imperishable, the soul when attacked by death cannot perish; for the preceding argument shows that the soul will not admit of death, or ever be dead, any more than three or the odd number will admit of the even, or fire or the heat in the fire, of the cold. Yet a person may say: 'But although the odd will not become even at the approach of the even, why may not the odd perish and the even take the place of the odd?' Now to him who makes this objection, we cannot answer that the odd principle is imperishable; for this has not been acknowledged, but if this had been acknowledged, there would have been no difficulty in contending that at the approach of the even the odd principle and the number three took their departure; and the same argument would have held good of fire and heat and any other thing.