Harbor Lights lyrics

I saw the harbor lights

They only told me we were parting<a href="http://www.testimania.com/">Testi Canzoni</a>
Those same old harbor lights
That once brought you to me.

I watched the harbor lights
How could I help it?
Tears were starting.
Good-bye to golden nights
Beside the silvery seas.

I long to hold you dear,
And kiss you just once more.
But you were on the ship,
And I was on the shore.

Now I know lonely nights
For all the while my heart keeps praying
That someday harbor lights
Will bring you back to me

Submitted by Guest

What do you think is the meaning of Harbor Lights by Elvis Presley?