This is probably somehow coded in human's mechanism. People's happiness and sadness are relative, and it's all dynamic. Most of those who won a really big lotte

This is probably somehow coded in human's mechanism. People's happiness and sadness are relative, and it's all dynamic. Most of those who won a really big lottery don't last happy as long as they thought. Most of those who lost their legs will accept the truth after a while and find it's bad but it's not all that bad. This makes some people keep pursuing higher goals, while some other people find to get out of the loop is to enjoy their life right now.