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Most true.

Seeing then, I said, that there are three distinct classes, any meddling of one with another, or the change of one into another, is the greatest harm to the State, and may be most justly termed evil-doing?

Precisely.

And the greatest degree of evil-doing to one's own city would be termed by you injustice?

Certainly.

This then is injustice; and on the other hand when the trader, the auxiliary, and the guardian each do their own business, that is justice, and will make the city just.

I agree with you.

We will not, I said, be over-positive as yet; but if, on trial, this conception of justice be verified in the individual as well as in the State, there will be no longer any room for doubt; if it be not verified, we must have a fresh enquiry. First let us complete the old investigation, which we began, as you remember, under the impression that, if we could previously examine justice on the larger scale, there would be less difficulty in discerning her in the individual. That larger example appeared to be the State, and accordingly we constructed as good a one as we could, knowing well that in the good State justice would be found. Let the discovery which we made be now applied to the individual—if they agree, we shall be satisfied; or, if there be a difference in the individual, we will come back to the State and have another trial of the theory. The friction of the two when rubbed together may possibly strike a light in which justice will shine forth, and the vision which is then revealed we will fix in our souls.

That will be in regular course; let us do as you say.

I proceeded to ask: When two things, a greater and less, are called by the same name, are they like or unlike in so far as they are called the same?

Like, he replied.

The just man then, if we regard the idea of justice only, will be like the just State?

He will.

And a State was thought by us to be just when the three classes in the State severally did their own business; and also thought to be temperate and valiant and wise by reason of certain other affections and qualities of these same classes?

True, he said.

And so of the individual; we may assume that he has the same three principles in his own soul which are found in the State; and he may be rightly described in the same terms, because he is affected in the same manner?

Certainly, he said.

Once more then, O my friend, we have alighted upon an easy question—whether the soul has these three principles or not?

An easy question! Nay, rather, Socrates, the proverb holds that hard is the good.

Very true, I said; and I do not think that the method which we are employing is at all adequate to the accurate solution of this question; the true method is another and a longer one. Still we may arrive at a solution not below the level of the previous enquiry.

May we not be satisfied with that? he said;—under the circumstances, I am quite content.

I too, I replied, shall be extremely well satisfied.

Then faint not in pursuing the speculation, he said.

Must we not acknowledge, I said, that in each of us there are the same principles and habits which there are in the State; and that from the individual they pass into the State?—how else can they come there? Take the quality of passion or spirit;—it would be ridiculous to imagine that this quality, when found in States, is not derived from the individuals who are supposed to possess it, e.g. the Thracians, Scythians, and in general the northern nations; and the same may be said of the love of knowledge, which is the special characteristic of our part of the world, or of the love of money, which may, with equal truth, be attributed to the Phoenicians and Egyptians.

Exactly so, he said.

There is no difficulty in understanding this.

None whatever.

But the question is not quite so easy when we proceed to ask whether these principles are three or one; whether, that is to say, we learn with one part of our nature, are angry with another, and with a third part desire the satisfaction of our natural appetites; or whether the whole soul comes into play in each sort of action—to determine that is the difficulty.

Yes, he said; there lies the difficulty.

Then let us now try and determine whether they are the same or different.

How can we? he asked.

I replied as follows: The same thing clearly cannot act or be acted upon in the same part or in relation to the same thing at the same time, in contrary ways; and therefore whenever this contradiction occurs in things apparently the same, we know that they are really not the same, but different.

Good.

For example, I said, can the same thing be at rest and in motion at the same time in the same part?

Impossible.

Still, I said, let us have a more precise statement of terms, lest we should hereafter fall out by the way. Imagine the case of a man who is standing and also moving his hands and his head, and suppose a person to say that one and the same person is in motion and at rest at the same moment—to such a mode of speech we should object, and should rather say that one part of him is in motion while another is at rest.

Very true.

And suppose the objector to refine still further, and to draw the nice distinction that not only parts of tops, but whole tops, when they spin round with their pegs fixed on the spot, are at rest and in motion at the same time (and he may say the same of anything which revolves in the same spot), his objection would not be admitted by us, because in such cases things are not at rest and in motion in the same parts of themselves; we should rather say that they have both an axis and a circumference, and that the axis stands still, for there is no deviation from the perpendicular; and that the circumference goes round. But if, while revolving, the axis inclines either to the right or left, forwards or backwards, then in no point of view can they be at rest.

That is the correct mode of describing them, he replied.

Then none of these objections will confuse us, or incline us to believe that the same thing at the same time, in the same part or in relation to the same thing, can act or be acted upon in contrary ways.

Certainly not, according to my way of thinking.

Yet, I said, that we may not be compelled to examine all such objections, and prove at length that they are untrue, let us assume their absurdity, and go forward on the understanding that hereafter, if this assumption turn out to be untrue, all the consequences which follow shall be withdrawn.

Yes, he said, that will be the best way.

Well, I said, would you not allow that assent and dissent, desire and aversion, attraction and repulsion, are all of them opposites, whether they are regarded as active or passive (for that makes no difference in the fact of their opposition)?