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Str. Yes, we must, and must go at it with all our might, by following another track of his—in this way. Tell me; of the expressions connected with menial occupations some are in common use, are they not?
226
Theaet. Yes, many. But to which of the many does your question refer?
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Str. To such as these: we say sift and strain and winnow and separate. Apparently a term descriptive of some part of the process of weaving; cf. Plat. Crat. 338b.
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Theaet. Certainly.
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Str. And besides these there are card and comb and beat the web and countless other technical terms which we know. Is it not so?
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Theaet. Why do you use these as examples and ask about them all? What do you wish to show in regard to them?
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Str. All those that I have mentioned imply a notion of division.
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Theaet. Yes.
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Str. Then since there is, accorling to my reckoning, one art involved in all of these operations, let us give it one name.
226
Theaet. What shall we call it?
226
Str. The art of discrimination.
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Theaet. Very well.
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Str. Now see if we can discover two divisions of this.
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Theaet. You demand quick thinking, for a boy like me.
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Str. And yet, in the instance of discrimination just mentioned there was, first, the separation of worse from better, and, secondly, of like from like.
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Theaet. Yes, as you now express it, that is pretty clear.
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Str. Now I know no common name for the second kind of discrimination; but I do know the name of the kind which retains the better and throws away the worse.
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Theaet. What is it?
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Str. Every such discrimination, as I think, is universally called a sort of purification.
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Theaet. Yes, so it is.
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Str. And could not anyone see that purification is of two kinds?
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Theaet. Yes, perhaps, in time; but still I do not see it now.
226
Str. Still there are many kinds of purifications of bodies, and they may all properly be included under one name.
226
Theaet. What are they and what is the name?
