There is popular Native American legend, a Cherokee tale, called “Two Wolves” that I come across often in spiritual and psychological literature and lectures: An old Cherokee is teaching his grandson about life. “A fight is going on inside me,” he said to the boy. “It is a terrible fight and it is between two...

“It often seems that I could fill a practice with cases of falling out of love, so common is the complaint,” writes bestselling author and renowned psychiatrist Peter D. Kramer in book, “Should You Leave?” He chronicles dozens of cases based on the stories of his patients and arrives at this little mantra: “Depression causes...