It is often said that Understanding is everything. Understanding, unapplied, is not enough. To have understanding while living as if one is a mere body/mind in a world, changes nothing. Understanding must be applied. One must be the Understanding.
In that context, the truth is that the author really has no information for anyone. What he continues to say in many different ways is simply that what you believe isn't so. Investigate that fully
and you'll see that de-energizing mental projections and assumptions, and not enhanced understanding, is all that is needed.