He who knows and he who knows not...

I came across this Persian proverb today, while reading Joel Rosenberg's, "The Twelfth Imam,"

He who knows not and knows not that he knows not is a fool - shun him.
He who knows not and knows that he knows not is a child - teach him.
He who knows and knows not that he knows is asleep - awake him.
He who knows and knows that he knows is wise - follow him.