In her book, Bittersweet: How Sorrow and Longing Make Us Whole, Cain shows how a bittersweet state of mind is the quiet force that helps us transcend our personal and collective pain, whether from a death or breakup, addiction or illness. If we don’t acknowledge our own heartache, she says, we can end up inflicting it on others via abuse, domination, or neglect. But if we realize that all humans know—or will know—loss and suffering, we can turn toward one another. (Click here to view on Amazon).