Once, I knew a fine song,
- It is true, believe me -
It was all of birds,
And I held them in a basket;
When I opened the wicket,
Heavens! They all flew away.
I cried, 'Come back, little thoughts!'
But they only laughed.
They flew on
Until they were as sand
Thrown between me and the sky.

Stephen Crane

http://www.poemhunter.com/poem/scaped/