defining what is "normal" is a big problem, so psychosis is a very difficult thing to talk about as a diagnosis

i can honestly say that i have experienced more than a few deep psychotic episodes in my life but i think that you have to fall into this stuff to be able to recognise it

these days i define a lot of the normals based on biology, and i think that if i were to define psychosis i would talk about how a pathological psychosis (psychopathy) is an inversion of biology

for example

homosexuality

pedophilia

murder

cult leader

satan worshipper

this is a sickness that makes people in some cases prone to manipulating other people to comply with their self delusions

really, the psychopathy is just where the psychosis focuses on the importance of the individual and how other people have to be sacrificed to that altar