SHE gathered at her slender waist 
The beauteous robe she wore; 
Its folds a golden belt embraced, 
One rose-hued gem it bore. 
 
The girdle shrank; its lessening round 
Still kept the shining gem, 
But now her flowing locks it bound, 
A lustrous diadem. 
 
And narrower still the circlet grew; 
Behold! a glittering band, 
Its roseate diamond set anew, 
Her neck's white column spanned. 
 
Suns rise and set; the straining clasp 
The shortened links resist, 
Yet flashes in a bracelet's grasp 
The diamond, on her wrist. 
 
At length, the round of changes past 
The thieving years could bring, 
The jewel, glittering to the last, 
Still sparkles in a ring. 
 
So, link by link, our friendships part, 
So loosen, break, and fall, 
A narrowing zone; the loving heart 
Lives changeless through them all.
Oliver Wendell Holmes
http://www.poemhunter.com/poem/the-girdle-of-friendship/