I was googling a random song lyric and came across this blog post, which led me to this.
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)

