"I believe we all carry grief that has gone unnamed and unmourned," writes best-selling author Christine Valters Paintner. "Nothing in our culture prepares us to deal with darkness and grief. We are told to cheer up and move on, to shop or drink our way to forgetting the pain we carry. Yet I believe that being faithful to our own dark moments is the path of true prayer." In her book, A Midwinter God: Encountering the Divine in Seasons of Darkness,...