THEAETETUS: Exactly.

STRANGER: And do we not see that opinion is opposed to desire, pleasure

to anger, reason to pain, and that all these elements are opposed to one

another in the souls of bad men?

THEAETETUS: Certainly.

STRANGER: And yet they must all be akin?

THEAETETUS: Of course.

STRANGER: Then we shall be right in calling vice a discord and disease

of the soul?

THEAETETUS: Most true.

STRANGER: And when things having motion, and aiming at an appointed

mark, continually miss their aim and glance aside, shall we say that

this is the effect of symmetry among them, or of the want of symmetry?

THEAETETUS: Clearly of the want of symmetry.

STRANGER: But surely we know that no soul is voluntarily ignorant of

anything?

Sophist