Related:

• Even a fool is thought wise if he keeps silent, and discerning if he holds his tongue.
  Miscellaneous Prove...
• A fool shows his annoyance at once, but a prudent man overlooks an insult. Miscellaneous Proverb
• Trischmann's Paradox: A pipe gives a wise man time to think and a fool something to stick in his mouth.
• Axiom of the Pipe (Trischmann's Paradox) A pipe gives a wise man time to think and a fool something to stick in his mouth.
• A pipe gives a wise man time to think and a fool something to stick in his mouth.
  -- Trischmann's Paradox...
• A pipe gives a wise man time to think and a fool something to stick in his mouth.
• A fool finds pleasure in evil conduct, but a man of understanding delights in wisdom.
  Miscellaneous Proverb...
• A fool finds no pleasure in understanding but delights in airing his own opinions.
  Miscellaneous Proverb...
• Do not answer a fool according to his folly, or you will be like him yourself.
  Miscellaneous Proverb...