(T)he bittersweet tradition spans centuries—it spans continents. And it teaches us that we are creatures who are born to transform pain into beauty. … - Susan Cain

Hayes and his colleagues have distilled these insights into seven skills for coping with loss. In more than a thousand studies over thirty-five years, they’ve found that the acquisition of this skill set predicts whether people facing loss fall into anxiety, depression, trauma, substance abuse — or whether they thrive. The first five skills involve acceptance of the bitter. First, we need to acknowledge that a loss has occurred; second, to embrace the emotions that accompany it. Instead of trying to control the pain, or to distract ourselves with food, alcohol, or work, we should simply feel our hurt, sorrow, shock, anger. Third, we need to accept all our feelings, thoughts, and memories, even the unexpected and seemingly inappropriate ones, such as liberation, laughter, and relief. Fourth, we should expect that sometimes we’ll feel overwhelmed. And fifth, we should watch out for unhelpful thoughts, such as “I should be over this,” “It’s all my fault,” and “Life is unfair.” Indeed, the ability to accept difficult emotions — not just observe them, not just breathe through them, but actually, nonjudgmentally, accept them — has been linked repeatedly to long-term thriving.

"One noteworthy study suggests that people who suppress negative emotions tend to leak those emotions later in unexpected ways. The psychologist Judith Grob asked people to hide their emotions when she showed them disgusting images. She even had them hold pens in their mouths to prevent them from frowning. She found that this group reported feeling less disgusted by the pictures than did those who'd been allowed to react naturally. Later, however, the people who hid their emotions suffered side effects. Their memory was impaired, and the negative emotions they'd suppressed seemed to color their outlook. When Grob had them fill in the missing letter to the word "gr_ss", for example, they were more likely than others to offer "gross" rather than "grass". "People who tend to [suppress their negative emotions] regularly," concludes Grob, "might start to see their world in a more negative light." p. 223"

In her book Anger: The Misunderstood Emotion, Carol Tavris recounts a story about a Bengali cobra that liked to bite passing villagers. One day a swami — a man who has achieved self-mastery — convinces the snake that biting is wrong. The cobra vows to stop immediately, and does. Before long, the village boys grow unafraid of the snake and start to abuse him. Battered and bloodied, the snake complains to the swami that this is what came of keeping his promise.
“I told you not to bite,” said the swami, “but I did not tell you not to hiss.”
“Many people, like the swami’s cobra, confuse the hiss with the bite,” writes Tavris.