The actor Diane Kruger was offered a role that would make her a household name. But it required her to play a young wife and mother experiencing the loss of her husband and child, and she had never personally suffered loss to such a degree. She didn’t know if she could be believable. But she accepted, and in order to prepare, she began attending support meetings for people walking through the valley of extreme grief.

Initially she offered suggestions and thoughts when those in the group shared their stories. She, like most of us, wanted to be helpful. But gradually she…