"A closed mouth don't get fed!"

While not grammatically correct, could a statement be more true?
Of course there are more meanings to that statement than an empty stomach. In a way I guess you could apply that statement to a great many things in life. Apply it to your brain, opinion, weight gain/loss, relationships, appetites & passions and i think the list could go on & on & on.
As Confusious said "An opinion set in stone is that of stupidity."  Look that up on Googgle or Bing.