Plato: The Republic

1. BOOK I (continued)

Proceed.

I will proceed by asking a question: Would you not say that a horse has some end?

I should.

And the end or use of a horse or of anything would be that which could not be accomplished, or not so well accomplished, by any other thing?

I do not understand, he said.

Let me explain: Can you see, except with the eye?

Certainly not.

Or hear, except with the ear?

No.

These then may be truly said to be the ends of these organs?

They may.

But you can cut off a vine-branch with a dagger or with a chisel, and in many other ways?

Of course.

And yet not so well as with a pruning-hook made for the purpose?

True.

May we not say that this is the end of a pruning-hook?

We may.

Then now I think you will have no difficulty in understanding my meaning when I asked the question whether the end of anything would be that which could not be accomplished, or not so well accomplished, by any other thing?

I understand your meaning, he said, and assent.

And that to which an end is appointed has also an excellence? Need I ask again whether the eye has an end?

It has.