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?

STRANGER: The one may be compared to disease in the body, the other to

deformity.

THEAETETUS: I do not understand.

STRANGER: Perhaps you have never reflected that disease and discord are

the same.

THEAETETUS: To this, again, I know not what I should reply.

STRANGER: Do you not conceive discord to be a dissolution of kindred

elements, originating in some disagreement?

THEAETETUS: Just that.

STRANGER: And is deformity anything but the want of measure, which is

always unsightly?

Sophist