Stephen Crane - Once There Was a Man

Once there was a man --
Oh, so wise!
In all drink
He detected the bitter,
And in all touch
He found the sting.
At last he cried thus:
"There is nothing --
No life,
No joy,
No pain --
There is nothing save opinion,
And opinion be damned."

Stephen Crane

http://www.poemhunter.com/poem/once-there-was-a-man/