Narcissus was a man so consumed with his self-image that he drowned in it.

a. Freud believed that some narcissism is an essential part of all of us from birth
b. Andrew Morrison claims that, in adults, a reasonable amount of healthy narcissism allows the individual's perception of his need to be balanced in relation to others
c. In psychology and psychiatry, excessive narcissim is recognized as a severe personality dysfunction or personality disorder, most characteristically Narcissitic Personality Disorder, also referred to as NPD.
d. The terms "narcissm" , "narcissistic" and "narcissist" are often used as pejoratives, denoting vanity,conceit, egotism or simple selfishness.