228–229
Theaetetus
Theaet. It must certainly be admitted, though I disputed it when you said it just now, that there are two kinds of vice in the soul, and that cowardice, intemperance, and injustice must all alike be considered a disease in us, and the widespread and various condition of ignorance must be regarded as a deformity.
Stranger
Str. In the case of the body there are two arts which have to do with these two evil conditions, are there not?
Theaetetus
Theaet. What are they?
Stranger
Str. For deformity there is gymnastics, and for disease medicine.
Theaetetus
Theaet. That is clear.
Stranger
Str. Hence for insolence and injustice and cowardice is not the corrective art the one of all arts most closely related to Justice?
Theaetetus
Theaet. Probably it is, at least according to the judgement of mankind.
Stranger
Str. And for all sorts of ignorance is there any art it would be more correct to suggest than that of instruction?
5
Theaetetus
Theaet. No, none.
Stranger
Str. Come now, think. Shall we say that there is only one kind of instruction, or that there are more and that two are the most important?
Theaetetus
Theaet. I am thinking.
Stranger
Str. I think we can find out most quickly in this way.
Theaetetus
Theaet. In what way?
10
Stranger
Str. By seeing whether ignorance admits of being cut in two in the middle; for if ignorance turns out to be twofold, it is clear that instruction must also consist of two parts, one for each part of ignorance.
Theaetetus
Theaet. Well, can you see what you are now looking for?
