Henry Wadsworth Longfellow

Fata Morgana

O sweet illusions of Song,
  That tempt me everywhere,
In the lonely fields, and the throng
  Of the crowded thoroughfare! 

I approach, and ye vanish away,
  I grasp you, and ye are gone;
But ever by night an day,
  The melody soundeth on. 

As the weary traveller sees
  In desert or prairie vast,
Blue lakes, overhung with trees,
  That a pleasant shadow cast; 

Fair towns with turrets high,
  And shining roofs of gold,
That vanish as he draws nigh,
  Like mists together rolled,-- 

So I wander and wander along,
  And forever before me gleams
The shining city of song,
  In the beautiful land of dreams. 

But when I would enter the gate
  Of that golden atmosphere,
It is gone, and I wonder and wait
  For the vision to reappear.