Related:

• He who knows nothing doubts nothing. Italian Proverb
• He that converses not, knows nothing. -- Thomas Fulle
• He who knows nothing, loves nothing. He who can do nothing understands nothing.
  He who understands nothing is worthless. -- Paracelsu...
• He who knows nothing, knows nothing. But he who knows he knows nothing knows something.
  And he who knows someone whose friend's wife's brother knows nothing, he knows something....
• A fool knows everything and nothing.
• He knows nothing; and he thinks he knows everything.
  That points clearly to a political career. SHAW...
• Taught him everything I know, and still he knows nothing.
• He knows nothing and thinks he knows everything. That points clearly to a political career.
  --George Bernard Shaw...
• An expert is one who knows more and more about less and less until he knows absolutely nothing about everything.