Beware of a man's shadow and a bee's sting.

Related:

• The hippo has no sting, but the wise man would rather be sat upon by the bee.
  Banacek's Eighteenth Polish...
• Banacek's Eighteenth Polish Proverb: The hippo has no sting,
  but the wise man would rather be sat upon by the bee...
• Beware a man of one book. --
  English...
• Beware of a man of one book.
  Latin...
• The honey is sweet, but the bee has a sting. --
  Benjamin...
• Beware of a man that does not talk and a dog that does not bark.
  Portuguese...
• Float like a butterfly, sting like a bee. --
  Drew Bundini...
• From praise, as from a shadow, a man is neither bigger nor smaller.
  Danish...
• Beware lest you lose the substance by grasping at the
  shadow....