Analyzing delusional beliefs, what is the importance of identifying underlying beliefs related to the self and others?

Identifying underlying beliefs related to the self and others can provide direct clues for the formation and control of delusions.
The context of the patient's life can help understand the delusional beliefs.
The treatment of delusional beliefs should not be complemented with the assessment of dysfunctional attitudes.
The persistence of delusional beliefs is not important in the functional assessment.