At the end of the row  
I stepped on the toe  
Of an unemployed hoe.  
It rose in offense  
And struck me a blow  
In the seat of my sense.  
It wasn't to blame  
But I called it a name.  
And I must say it dealt  
Me a blow that I felt  
Like a malice prepense.  
You may call me a fool,  
But was there a rule  
The weapon should be  
Turned into a tool?  
And what do we see?  
The first tool I step on  
Turned into a weapon.
Robert Frost
http://www.poemhunter.com/poem/the-objection-to-being-stepped-on/