Shakespear, Merchant of Venice,
                Act: V. Scene 1.

  the Poet
  Did feign that Orpheus drew trees, stones and floods,
  since nought so stockish, hard and full of rage,
  But musick for the time doth change his nature.
     The man that hath no Musick in himself
  Nor ist not mov'd with concord of sweet Sounds,
  Is fit for treasons, Stratagems, and Spoils;
  The motions of his Spirit are dull as night,
  And his affections dark as Erebus:
  Let no such man be trusted.