It is never easy to do things right before it is done. so we try to make divine before something happens.
Different decision and choice always lead different end. Multiple space-time exists?
奇門遁甲 is a kind of divine for people to do better decision according to the time and the position they are locating. It is a profound theory about time and space. It is mysterious study back to five thousand years ago invented by a godman who helped Empire to win the battles to his enemy.
Today this theory has already been simplified to 1080 set of situation to explain divine.