Related:

• What you don't know can hurt you, only you won't know it.
• What you don't know can't hurt you.
• You must know that a man can have only one invulnerable loyalty, loyalty to his own concept of the obligations of manhood.
  All other loyalties are merely deputies of that one. -- Nero Wolfe...
• THEY CAN ALWAYS HURT YOU MORE.
• What you don't know will always hurt you. First Law of Blissful Ignorance
• You know you're getting old when everything hurts. And what doesn't hurt doesn't work.
  -- Hy Gardne...
• Oh, he [a big dog] hunts with papa," she said. "He says Don Carlos [the dog] is good for almost every kind of game.
  He went duck hunting one time and did real well at it....