Derren Brown is an English mentalist, illusionist, and author. He is also a master at understanding human nature, potential and capability.
If you have never heard of him then you can watch his films on Netflix.
But available on Youtube is his documentary: The Secret of Luck: see Derren Brown - The Experiments - The Secret of Luck - YouTube
The implications are very significant because it suggests that belief has a very big impact on our success/life trajectory.
It means belief can “cap” human capability and growth, and this would include leadership capability.
That is why the MarkTwo leadership programs focus so much on changing mindsets so we see more of reality.