The Scriptures spend much time--and an entire group of books [i.e., the Wisdom Literature]--discussing the topic of wisdom. The contrast is constantly drawn, especially in Proverbs, of the wise vs. the fool. It seems this idea crept into Persia at some point, and came back out in the form of this Persian proverb:
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; wake him.
He who knows, and knows that he knows, is wise; follow him.
God's truth. Man's words. Good stuff.
Stay away from a foolish man, for you will not find knowledge on his lips.
The wisdom of the prudent is to give thought to their ways, but the folly of fools is deception.
--Proverbs 14:7-8, NIV