It was a mercy killing. 
 
I took the weapon in clenched fist.  
 
I looked directly at the thing,  
 
the limping, dumb, weeping thing,  
 
crawling each day through,  
 
mercifully numb, in darkness,  
 
in distress and in denial. 
 
I raised the weapon, struck  
 
coldly  
 
at its fainting form. 
 
 
 
And from its death throes,  
 
as it thrashed and bled,  
 
I recognised  
 
that after it was dead  
 
it still could rise again,  
 
no more a dying marriage,  
 
but an understanding bond,  
 
straighter, clearer.  
 
Honesty beat strongly at its core  
 
and in this life  
 
we could not ask for more.
Janice Windle
http://www.poemhunter.com/poem/pains-and-regrets-collection-a-mercy-killing/