SOCRATES: Seeing then that men become good and useful to states, not only
because they have knowledge, but because they have right opinion, and that
neither knowledge nor right opinion is given to man by nature or acquired
by him--(do you imagine either of them to be given by nature?

MENO: Not I.)

SOCRATES: Then if they are not given by nature, neither are the good by
nature good?

MENO: Certainly not.

SOCRATES: And nature being excluded, then came the question whether virtue
is acquired by teaching?

MENO: Yes.

SOCRATES: If virtue was wisdom (or knowledge), then, as we thought, it was
taught?

MENO: Yes.

SOCRATES: And if it was taught it was wisdom?

MENO: Certainly.

SOCRATES: And if there were teachers, it might be taught; and if there
were no teachers, not?