Donald W. Black said this quote

“ Narcissistic personality disorder is named for Narcissus, from Greek mythology, who fell in love with his own reflection. Freud used the term to describe persons who were self-absorbed, and psychoanalysts have focused on the narcissist's need to bolster his or her self-esteem through grandiose fantasy, exaggerated ambition, exhibitionism, and feelings of entitlement. ”