Related:

• It's a very rare and precious Chinese puzzle box. You won't be able to open it, so put it down.
  -- Countess Scarlioni, CITY OF DEATH...
• A razor may be sharper than an ax, but it cannot cut wood. African(Annang) Proverb
• How sharper than a serpent's tooth it is To have a thankless child!
  -- William Shakespeare (1564-1616), King Lear -- Act i, Sc. 4...
• There are two instruments worse than a clarinet. Two clarinets.
• How sharper than a serpent's tooth it is to have a thankless hound.
• How sharper than a hound's tooth it is to have a thankless serpent.