Knowing Know

He who knows not and knows not that he knows not, is a fool -- shun him.
He who knows not and knows he knows not, is simple -- teach him.
He who knows and knows not that he knows, is asleep -- wake him.
He who knows and knows he knows, is wise -- follow him but carefully for
He doesn't know what he doesn't know.
Nor do you know what you don't know.