Stephen Crane - I Saw a Man

I saw a man pursuing the horizon;
Round and round they sped.
I was disturbed at this;
I accosted the man.
"It is futile," I said,
"You can never -- "

"You lie," he cried,
And ran on.

Stephen Crane

http://www.poemhunter.com/poem/i-saw-a-man/