Related:

• As it is in the proverb, played Cretan against Cretan.
  -- Plutarch (46-120 AD) -- Life of Lysande...
• Custom is almost a second nature.
  -- Plutarch (46-120 AD) -- Rules for the Preservation of Health, 18...
• What is philosophy but a continual battle against custom? -- Thomas Carlyle
• For to err in opinion, though it be not the part of wise men, is at least human.
  -- Plutarch (46-120 AD) -- Against Colote...
• Zeno first started that doctrine that knavery is the best defence against a knave.
  -- Plutarch (46-120 AD) -- Of Bashfulne...
• You should never bet against anything in science at odds of more than about 10^12 to 1.
  -- Ernest Rutherford...