which she wants to arrive, and this we should understand to be her aim.

THEAETETUS: Yes, I understand; and I agree that there are two sorts of
purification, and that one of them is concerned with the soul, and that
there is another which is concerned with the body.

STRANGER: Excellent; and now listen to what I am going to say, and try to
divide further the first of the two.

THEAETETUS: Whatever line of division you suggest, I will endeavour to
assist you.

STRANGER: Do we admit that virtue is distinct from vice in the soul?

THEAETETUS: Certainly.

STRANGER: And purification was to leave the good and to cast out whatever
is bad?

THEAETETUS: True.

STRANGER: Then any taking away of evil from the soul may be properly
called purification?

THEAETETUS: Yes.

STRANGER: And in the soul there are two kinds of evil.

THEAETETUS: What are they?