From "Demon"

Sailless and without a rudder,
  On the ocean of the air--
Float the choirs of stars harmonious,
  'Mid the mists eternal there;
Fleecy flocks of clouds elusive
  Drift across immensity,
Leaving ne'er a track behind them,
  Following their destiny.
Hour of parting, hour of meeting
  They know not,--nor grief, nor rest--
Theirs no longing for the future,
  Theirs no sorrow for the past.
By thy day of anguish broken,
  Think of them and calm thy woe--
Be indifferent as they are
  To the pangs of earth below!