It depends on someone's personality actually. When you are in severe pain be it emotionally or physically you are just ecstatic those days that you are not in pain. That's all it matters. For others it turns into resentment and jealousy because they see people enjoying their lives while they can't. Many people in pain become tougher and misanthropic, you can see this in many movies actually, Al Pacino in scent of a woman who was incredibly mean and bitter because he was blind. Remember also Tom Hanks in Forrest Gump. Leautenant Dan was extremely cruel with others because he lost his legs in the war. He kept that anger for years until he made peace with himself after meeting Forest Gamp.