If someone starts to develop the early signs and symptoms of schizophrenia, it is highly likely that their thought process can be changed before the delusions become a part and parcel of their life. Note that once a delusion becomes ingrained in a patient’s mind, talking the patient out of believing it becomes too tall an order to make. Just like hallucinations, delusions have their share of credibility for patients with schizophrenia since they have no viable reason to doubt the credibility or validity of what they are thinking.
For instance, someone’s brain convinces that that they are feeling cold during winter if they do not put on a coat. It is certain the patient is feeling cold. When the same reliable brain communicates to the patient that everyone is plotting evil against them, this is an internally generated misinformation that appears as valid as information that the outside temperature is cold. In other words, the same thoughts that have served someone very well for the better part of their lives appear to the patient to be communicating reliable information; hence the delusion will appear just as real as all valid information that their brain has ever provided. With schizophrenia delusions, there is nothing to tell apart the delusional beliefs from actual beliefs that the brain generates.
The good news is that if the patient can be reached by positive external influences like therapy, before the “fact” supporting the delusions gets overwhelming, it is highly likely that the basis of the delusion can be weakened much easier than if the “fact” is allowed to pile up over several years.