The author's comments about the "positive vs negative aspects of narcissism" are interesting.

I remember reading[0] about how one of the most effective ways to determine if someone is a narcissistic is to ask them... "are you a narcissistic?". That surprised me at first because self-diagnosis is almost always a bad idea, but on second glance it makes sense that people who think about themselves all day could be more introspective than normal (or sometimes not: they could waste their day thinking about how great they are).

But if part of success is understanding your own thought process and working around your strengths/weaknesses, these are useful insights for anyone on the narcissism spectrum (see: everyone)

Ref: [0] https://www.psychologytoday.com/us/blog/socially-relevant/20...