My words to live by

He that knows not,
and knows not that he knows not
is a fool.
Shun him

He that knows not,
and knows that he knows not
is a pupil.
Teach him.

He that knows,
and knows not that he knows
is asleep
Wake him.

He that knows,
and knows that he knows
is a teacher.
Follow him.

(Arabic proverb)