This is a quotation from a cached book on Silva Mind Control published decades ago.
Note the use of the term psychosis, with no attempt to identify subcatagories. The authors are also operating from unrestrained attribution bias. They went in loyal to Silva Mind Control and found what they wanted to find and would have been able to ingore what did not fit their expectations.
Anyone who is a devotee of Silva Method is basing their loyalties upon a literature grounded in assumptins untested by medical scientific protocol and whose author was not a trained health care provider and whose assumptions about mental illness would now be considered obsolete.
Back then, when safeguards were more lax, untrained persons were given access to institutionalized patients, in a manner that would not be permitted today.
Note the assumption voiced here that psychosis is engendered by abandonment during the first two years of life.
Today, a trained clinician or nurse or social worker would use a very different and more precise terminology.
Instead of speaking as this Silva Method book does, of the general condition of 'psychosis' care would be taken to classify according to the particular medical psychiatric condition, for today it is understood that some conditions are very heavily based on biochemical susceptiblity and that if treated properly, a person can be healthy and well functioning and not meet criteria for psychosis.
This is now considered quite out of date. It fits the catagory of borderline personality disorder, an Axis II disorder in which the growing self is wounded by repeated disruptions in the relationship between the tiny child and primary caregiver--usually between infancy and age 19 months.
By contrast, conditions such as schizophrenia and bipolar affective disorder