Perhaps the most fascinating part of this letter is observing people's reactions to it. In the letter, the author goes so far as to admit that s/he is and always will be a psychopath without a sense of guilt or remorse toward others and a keen ability to recognize and exploit weaknesses in others for his/her own gain.
Judging by the comments here, the letter has done just that. One comment below notes that "Jeez, that's the single most interesting, insightful, and well-written piece I've read on the internet in a long time." Others are expressing a desire to meet the author or expressing how they can identify with the author. It's incredible to see just how effectively this letter resonates with the people who read it.
Don't get me wrong: It's both impressive and admirable that the author was able to not only admit that he needed therapy but to press on long enough to make therapy work for himself in an effective manner. I don't want to downplay his accomplishments. However, it is still interesting to dissect and observe all of the persuasiveness of the letter and the fluidity with which the author transforms psychopathy from a very difficult personality disorder into somewhat of a super power that the reader can't help but envy by the end of the letter.
As you read the letter and experience strong feelings of empathy for the author, consider his own poignant words at the end: "In the end, psychopaths need to be given that very thing everyone believes they lack for others, empathy."
The letter begins with the psychopath distancing himself from the traditional destructive psychopathic traits in the most admirable and self-aggrandizing way possible: He went against all odds and admitted himself into treatment, where he claims the health agency had never seen someone of his nature walk-in before and he was too incredible of a case for anyone but the highest-ranking therapist to handle.
He continues by setting up various straw-man caricatures of psychopathy ("cartoon evil serial killers" and the CEO who prizes profits over people) and knocking them down one-by-one, leaving the reader feeling guilty of possibly embracing those stereotypes at one point. With the reader feeling a bit guilty, empathetic, and as if the author's condition is simply misunderstood, the author has set the stage to rebuild the reader's view of psychopathy in a way that benefits the author.
Toward the end, he even goes so far as to put words in the reader's mouth just so he can turn around and undermine the very caricature of a psychopath he suggested you might hold : "Such as statement might tempt you to say 'well obviously you're not a real psychopath then'. As if the definition of a psychopath is someone who exploits others for their personal power, satisfaction or gain."
The rest of the article explains the author's psychopathy the way the author wants you to view it: As "a highly trained perception, ability to adapt, and a lack of judgment borne of pragmatic and flexible moral reasoning." He goes on to say that he "enjoy[s] a reputation of being someone of intense understanding and observation with a keen strategic instinct." At this point, the author has completely distanced his psychopathy from the purely negative caricature he painted in the first half of his letter. Who wouldn't be envious of such incredible, valuable, and morally-neutral abilities as he described them?
I've read the letter several times over, and I'm still amazed at how effective it is at garnering empathy from the reader and cultivating a sense that the author is an impressive individual who has triumphed over adversity after a great struggle. And it's true that overcoming your own objections to seek, and stick with, treatment for such a severe personality disorder is both impressive and admirable. His points about the general public's misunderstanding of true psychopathy are equally true, although he crucially omits any and all explanations of how psychopathy can actually be dangerous and destructive to others. It's an incredible piece of writing, and incredibly persuasive and manipulative in a way that I'm sure PR and marketing teams everywhere would be jealous of.