Gild the Lily?

  Therefore, to be possess'd with double pomp,
 
To guard a title that was rich before,
  To gild refined gold, to paint the lily,
  To throw a perfume on the violet,
  To smooth the ice, or add another hue
  Unto the rainbow, or with taper-light
  To seek the beauteous eye of heaven to garnish,
  Is wasteful and ridiculous excess.

- William Shakespeare, King John:

Pride Goeth before a Fall?

Pride goeth before destruction,
and an haughty spirit before a fall.

- Proverbs 16:18

Soothe the Savage Beast?

Music hath charms to soothe the savage breast,
To soften rocks, or bend a knotted oak.

- William Congreve, The Mourning Bride, 1.1

All that Glitters?

All that glisters is not gold;
Often have you heard that told.
Many a man his life hath sold
But my outside to behold.
Gilded tombs do worms enfold.

- William Shakespeare,
The Merchant of Venice
(II, vii)