Most people have an unconscious upper limit on how much success, love, and happiness they will allow themselves.

The short version: a quick read to help you decide. Not a replacement for the book.
Hendricks names the Upper Limit Problem — the pattern of self-sabotage that emerges precisely when things are going well.
Every person has an unconscious set-point for how much positive feeling they believe they deserve; exceeding it triggers self-sabotage back to the familiar level.
1. The Upper Limit Problem is real — and almost universal.
Things going wrong right after things go well is often not coincidence.
2. There are four hidden barriers that trigger upper limiting.
Feeling flawed, fear of burdening others, zero-sum thinking, fear of outshining.
3. Your Zone of Genius is where your greatest contribution lives.
The intersection of deepest talent and greatest joy.
4. Upper limiting disguises itself as legitimate problems.
The timing and frequency reveal the pattern, not the events themselves.
5. Expanding your capacity for positive experience is a learnable skill.
Sustained success feels unfamiliar until you practice letting it be normal.
Anyone who has noticed things going wrong precisely when they start going right.
Principle: Self-sabotage shows up right when things go well.
The action: Identify three recent positive periods and what followed each.
Principle: Four false beliefs trigger upper limiting.
The action: Rate each of the four barriers and identify your primary one.
Principle: Upper limiting disguises itself as legitimate problems.
The action: For 30 days, ask "am I upper limiting right now?" when things go wrong.
Principle: The Big Leap is about spending more time in your Zone of Genius.
The action: Map your four zones and identify your Zone of Genius.