People who have some type of dementia can tell you that their brain doesn't work right any more. It can be so frustrating to them. Before the Alzheimer's progressed, during a lucid moment, my mother told me it felt as if her brain had been hijacked. She had always thought having dementia would be a piece of cake and wouldn't mind dying that way until she had it. She said she wouldn't wish that disease on anyone. Her lucid moments became farther and farther apart. It's sad watching someone who had a very sharp mind deteriorate and not even remember if they ate or didn't eat. My mother could remember what price she paid for something 50 years ago. She was right and not making it up because I remembered some prices that long ago.
Then, you have people who develop a mental illness. Their life is fine and then one day, their brain starts to change. They develop, schizophrenia, bi-polar disorder, post traumatic stress and possibly dissociate identity disorder - with or without multiple personalities.
Their life has changed forever and there is no way to turn back the hands of time to before their brain changed. Therapy, medication and new coping skills need to be put into place to have a "new normal" life for them.
In Multiple Personality Disorder, the brain changes because the person who is under severe abuse and trauma tells themselves they are going to die and need an army to help them. This only happens in the highly creative and intelligent. Not everyone who has been abused and traumatized will develop this personality disorder.
After the alternate personalities are formed, when the brain senses danger, a personality may or may not come out. The person doesn't always know when this is going to happen and in reality, their life is now being lived by someone else who lives inside their brain.
This may sound funny to some - only it's not funny at all.
Everyone works at a different rate of speed on their therapy. Some run from their problems. Some multiples (that is what people who have multiple personalities are called) learn how to work "their system" of personalities to make it through life while others want to be in control and integrate (combine the different personalities into their main personality).
You can read my journey of how I navigate life with multiple personality disorder in my book Navigating Life with Multiple Personality Disorder. Just click on the following words Navigating Life with Multiple Personality Disorder to buy my book on Amazon.com.