Old age think good quiet
Everything not concern heart
Self attend without great plan
Empty know return old forest
Pine wind blow undo belt
Hill moon light pluck qin
Gentleman ask end open reason
Fisherman song enter riverbank deep


Now in old age, I know the value of silence,
The world's affairs no longer stir my heart.
Turning to myself, I have no greater plan,
All I can do is return to the forest of old.
Wind from the pine trees blows my sash undone,
The moon shines through the hills; I pluck the qin.
You ask me why the world must rise and fall,
Fishermen sing on the steep banks of the river.

Wang Wei

http://www.poemhunter.com/poem/replying-to-subprefect-zhang/