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.
Every one is fond of comparing himself to something great and grandiose, as Louis XIV likened himself to the sun, and others have had like similes. I am more humble. I am a mere street scavenger (chiffonier) of science. With my hook in my hand and my basket on my back, I go about the streets of science, collecting what I find.