A man toiled on a burning road,
Never resting.
Once he saw a fat, stupid ass
Grinning at him from a green place.
The man cried out in rage,
"Ah! Do not deride me, fool!
I know you --
All day stuffing your belly,
Burying your heart
In grass and tender sprouts:
It will not suffice you."
But the ass only grinned at him from the green place.

Stephen Crane

http://www.poemhunter.com/poem/a-man-toiled-on-a-burning-road-2/