The great merit of this book is to share with us how the mind and brain (in the sense organ) function together.
And then, surprise, we find by integrating the concept of neuroplasticity (the brain's ability to recompose themselves), the mind (taken as qqchose tt completely independent) can influence, modify, view the organ controlling brain.
To try to keep it simple, we better understand the links between mental strength and neuroplasticity.
For those interested in the brain, I suggest that you read