Human cognition is a complex process, going from sensory to rational cognition. Cognition includes sensation, perception, symbol, thinking, judgment, reasoning... In which, perception is the reflection of human consciousness with a unified, complete objective thing, this is a higher reflection than sensation.

Auditory hallucinations are one of the common symptoms in people with schizophrenia, which is the basis for doctors to accurately diagnose the disease. Along with paranoia, auditory hallucinations cause patients to act abnormally, leading to behavior that is dangerous to themselves and society.

Schizophrenia often progresses silently and manifests itself with a variety of clinical symptoms when the disease is severe. Schizophrenic patients always have delusions and hallucinations about society and life. The disease often begins at the age of 25 and lasts a lifetime, making the patient a burden to the family and society.

Schizophrenia is a mental disorder that is on the rise in the community. The disease manifests itself in many different forms, but all have a major impact on the patient's life and can change the patient's personality in the long run.