Certainly, I think pain is necessary in our lives. Experiencing it allows us to defend ourselves and protect ourselves when it comes to physical pain. Emotional pain, although necessary, can also have more complex consequences, since it is about emotions, the balance of people. For example, when a loved one physically disappears, the pain is in the feelings, mourning and depression appear in many cases. Even emotional pain can lead to physical pain. I know of people who have reflected strong emotions in spinal cord pain and have even been paralyzed by it. An extremely interesting article, @cryptoitaly.