I shot an arrow into the air, it fell to earth, I knew not where;
For so swiftly it flew, my sight could not follow it in its flight.
I breathed a song into the air, it fell to earth, I knew not where;
For, who has sight so keen and strong that it can follow the flight of song?
Long, long afterward, in an oak, I found the arrow, still unbroke;
And the song, from beginning to end,
I found again in the heart of my friend.
-- Henry Wadsworth Longfellow