A delusion of grandeur is a false or unusual belief about one’s power, wealth, talents, and other traits. A person may believe, for instance, that they are famous, can end world wars, or that they are ...

Hallucinations are sensory experiences that seem real but aren’t, often arising from health conditions or substance use, while delusions are firm beliefs in false ideas despite contrary evidence.

A delusion is a belief based on an inaccurate interpretation of reality, despite clear evidence to the contrary. A delusional disorder causes a person to have delusional thoughts for a prolonged ...