Delusions can be quite debilitating psychologically and the more delusional we become the more debilitating and even harmful we can become, war is a good example of how debilitating and even harmful delusions can be. The ego is a delusion, it’s not who we are as a whole and it’s certainly something that is quite transitory, something we are unable to keep from life to life unless it’s through Karma. Why do we have karma? It’s to assist us to overcome such potentially debilitating harmful illnesses brought on by the ego. The thing with karma is we can’t take personal possessions from life to life, we can take the illness with us but that is all, everything else the ego created is left behind.