Many people that were labeled as mentally ill are in actuality open to the spiritual either genetically or from practice in past lives. Some of them are souls who were of Satan in a past life. Now entities such as greys and Corrupted Beings love attacking and harassing people and making them suffer. It does not matter if the person ever did anything against them or for Satan they will attack if they can. This can cause all sorts of mental symptoms and problems. People that are open to the spiritual can be completely mentally ill as well.
The next part is people who are mentally ill with no spiritual ability at all they usually are detached from reality in some way and think and say things that don’t make sense. Often times this is caused by chronic drug use. There really is a point of no return with that where a persons mind is messed up beyond repair and they are not even able to help themselves let alone get off it. These people are probably done for forever and won’t reincarnate unless for some reason a God helped them.
In gentiles when it comes to emotions it is possible for the emotions to completely shut down if the person had a traumatic experience or way too much pain. If a person is in total denial this can turn into becoming a psychopath. This kind of shutting down of emotions often happens eventually in the above people I mentioned. Entities such as the greys and Corrupted Beings often like to cause violent urges either suicidal homicidal or both. An example of this is Andrea Yates who heard the voice of “god” commanding her to kill her children because they would leave christianity at some point in their life and go to hell if she didn’t kill them something like that. Now obviously this is an attack from enemy entities along with mental illness such as depression.
Mental illness can also be caused by imbalances in the soul and by the teachings of the enemy these in themselves can lead to tragic events.
Astrology cannot always predict this because just about anyone if they did the wrong things could get into a state of mental illness or disharmony.
However hard aspects with Neptune things in the 12th house a very weak Saturn or few aspects with Saturn (strong Saturn grounds people despite the negative aspects of it and keeps them more in touch with reality) and stars like Polaris Scheet (spelling ?) and Algol can cause mental illness to be an inborn trait. However it’s not like in most cases all of this can’t be healed. However there are some cases where the person is too far gone.