Literature
Wize words
The one who knows,
and knows that he knows,
is intelligent.
Follow him.
The one who knows,
and doesn't know that he knows,
is a sleep.
Wake him.
The one who doesn't know,
and knows that he doesn't know,
can be taught.
Teach him.
The one who doesn't know,
and doesn't know that he doesn't know,
is stupid.
Repel him.