SOCRATES: And will not hearing be useful for virtue, if virtue is taught
by hearing and we use the sense of hearing in giving instruction?

CRITIAS: Yes.

SOCRATES: And since medicine frees the sick man from his disease, that art
too may sometimes appear useful in the acquisition of virtue, e.g. when
hearing is procured by the aid of medicine.

CRITIAS: Very likely.

SOCRATES: But if, again, we obtain by wealth the aid of medicine, shall we
not regard wealth as useful for virtue?

CRITIAS: True.

SOCRATES: And also the instruments by which wealth is procured?

CRITIAS: Certainly.

SOCRATES: Then you think that a man may gain wealth by bad and disgraceful
means, and, having obtained the aid of medicine which enables him to
acquire the power of hearing, may use that very faculty for the acquisition
of virtue?

CRITIAS: Yes, I do.

SOCRATES: But can that which is evil be useful for virtue?