" The man who knows not, but knows not that he knows not, is a fool . Shun him. The man who knows not, and knows that he knows not, is a student . Teach him. The man who knows, but knows not that he knows, is asleep. Awaken him. But the man who knows, and knows that he knows, is a teacher. Learn from him. - Persian proverb "
― Steve Berry , The Warsaw Protocol (Cotton Malone, #15)