Egomania is an obsessive preoccupation with one's self and applies to someone who follows their own ungoverned impulses and is possessed by delusions of personal greatness and feels a lack of appreciation. Someone suffering from this extreme egocentric focus is an egomaniac. The condition is psychologically normal and has been attributed to various historical figures and celebrities.
- H.C.R. Norriss Indulgent parents; Alienist Says they Make their Children Egomaniacs July 24, 1913 New York Times