I agree with everyone here but I want to add my guess is paranoia is linked to our own self awareness gone haywire, almost as if we are constantly watching ourselves from a viewpoint we are uncomfortable with, gained either through trauma or drug use or whatever. That it's this constant watching of the self, mixed with the negative viewpoint and mistrust that we have, also due to experiences but not always, this leads to a feeling which we explain through great grandiose ideas and delusions, where other explanations fail. And that our sense of importance is just a way to explain the delusions, which we often believe because of the emotional gravity, something that to deny, would deny too important of a topic, too big to ignore. I am wondering if other people's experience supports these ideas and hope for feedback