Who is hurt when you don't forgive?

Mary Poplin writes: "I was with Mother Teresa in Calcutta when [Christopher] Hitchens’ book came out, following his critical BBC movie. I had the opportunity to ask Mother about it and, struggling to recall the incident, she replied, “Oh, the book. It matters not. He is forgiven.” She and the sisters simply obeyed Christ’s commandment to forgive unconditionally.

Some say that not forgiving is like drinking poison hoping the other person dies. The sisters, read his book, prayed and fasted, examined themselves for any error, and let it go. They were free of his vitriol; he was bound by it."