Maybe it's an ex boyfriend? Girlfriend? 

A former landlord?

Someone from a lawsuit?

Is it a poor person who is lacking the resources you have consumed?

The easy answer we so want to give is nobody. 

But we rightly suspect that this response merely masks our unwillingness to engage in the valuable yet always uncomfortable exercise of self-reflection.

Wise Christians through the ages have contended that a deeper knowledge of ourselves always yields a deeper knowledge of God - and that when we are more intimately acquainted with those we have offended, we have an easier time forgiving those who offend us.

It's good to know why people are mad at us, whether or not we've done enough to patch things up, and have a better understanding of how we might avoid offending others down the road.