A sorrow that had origins in your grandparent's childhood may silently be influencing how you conduct your current relationships. Imagining how the grandparent's pain affected your parent can bring peace in your life and in your children's lives.
Best book about how generations need to have compassion and forgiveness for each other or the pain continues to visit future generations. Grosskoph professor at UW and he is an excellent writer and provides clarity around tough concepts.