SORROW, on wing through the world for ever, 
Here and there for awhile would borrow 
Rest, if rest might haply deliver 
            Sorrow. 
 
One thought lies close in her heart gnawn thorough 
With pain, a weed in a dried-up river, 
A rust-red share in an empty furrow. 
 
Hearts that strain at her chain would sever 
The link where yesterday frets to-morrow: 
All things pass in the world, but never 
            Sorrow.
Algernon Charles Swinburne
http://www.poemhunter.com/poem/sorrow-2/