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-2/