One of my teachers had each one of us bring a clear plastic bag and a sack of potatoes. For every person we'd refuse to forgive in our life, we were told to choose a potato, write on it the name and date, and put it in the plastic bag. Some of our bags, as you can imagine, were quite heavy.
We were then told to carry this bag with us everywhere for one week, putting it beside our bed at night, on the car seat when driving, next to our desk at work.
The hassle of lugging this around with us made it clear what a weight we were carrying spiritually, and how we had to pay attention to it all the time to not forget, and keep leaving it in embarrassing places.
Naturally, the condition of the potatoes deteriorated to a nasty slime. This was a great metaphor for the price we pay for keeping our pain and heavy negativity!
Too often we think of forgiveness as a gift to the other person, and while that's true, it clearly is also a gift for ourselves!
The purpose of this series is to encourage people to live as loving, compassionate, and peacemaking children of God: Jesus tells us to pray, "Thy kingdom come, thy will be done, on earth as it is in heaven." (Matthew 6:10) God tells us through Micah (6:8), "He has told you, O man, what is good; And what does the Lord require of you But to do justice, to love kindness, And to walk humbly with your God." And we know from Revelation 21:4 that there will be no more mourning, or crying, or pain, or death. Thus, Christian living requires us to set the standards of these conditions here on earth for our fellow human beings, and for the other animals, as a witness to the rest of the world. To do otherwise is not Christian.