All I can say is... I stopped reading self-help books 10 years ago because they all bored me to tears. I HATE fluff. I hate repeated ideas and concepts, I hate long intros... I usually will stop reading books 30% in because it's like "I get it".
This book, however, is written by a guy who basically died at 87 and studied self-esteem since he was very young. So basically he's studied the same topic for 60 years, and his ability to convey certain concepts is absolutely profound. He truly understands the concepts down to the core. And it's such a hard thing to explain when you get past the 'surface level', but he repeatedly does over and over throughout the whole book. I probably have over 100 passages highlighted on my Kindle, of particular sentences or paragraphs where I put the book down and was like........... DAMN.
I've referred the book to 2-3 people and they all were blown away. It's a book in a league of it's own. I heard of the book from my friend who mentioned it's his #1 self help book out of his favorite 10, and I can definitely see why.
Basically it just comes down to how well he can talk about such an abstract topic in many different ways, without repeating himself, and eventually one of those ways will 'click' for you.
I find it's also affecting me day to day, in a positive way, which is something books like this have never really done in the past. I tend to like/absorb the info but I don't vibe with the author or their knowledge on the subject enough to commit to whatever exercises they say to do, etc.
Hands down