eye for an eye
When I was growing up, there was a house down the street from us which had slightly tattered window coverings and the front lawn was like a graveyard of broken things. Posted on the fence was a "No trespassing" sign. I remember asking my mother what trespassing was so I could be certain not to do it to anyone who lived in that weird house. When she explained that it meant going into their yard uninvited I thought, no problem. Soon after that, when I first learned the Lord's Prayer, I thought it was weird that out of all the sins that Jesus would suggest we ask God to forgive it would be our trespassing. I pretty much made it a policy to stay out of strange yards, and since no one seemed to wander into ours uninvited, I thought I was covered. Only later did I realize that trespassing was only one of countless was to trespass against others. And now I get it -- kind of. Forgive us our sins as we forgive those who sin against us. Jesus always seems to be pairing God's forgiveness of us with our forgiveness of others.