Bittersweet: How Sorrow and Longing Make Us Whole

Susan Cain, who introduced the world to the upsides of introversion, is back on The Mountain Life with a look at how sorrow and longing make us whole. Her new book is called Bittersweet: How Sorrow and Longing Make Us Whole, which gives voice to those who understand that light and dark can—and should—coexist.