We have to work his 2 parts of the brain like the symbols to which spend 95% of visitors to our cathedrals without understanding them, read them, follow them, meditate etc.
So just to let go, a little imagination, dream to learn to talk to yourself and this book helps us. That is to say ... well, I so and so, what I'm told? If all the accidents of life, fracture, sprain, skull pain were due to call of the body, general practitioners would have to branch off to psychology to treat their patients. Conversely when one considers the number of psychosomatic illnesses, one can only think that there also has many true paths to look in that book for some of us.
So let's not Manichaean, open our minds rather than close it and the one who refuses to spend some doors of their minds as Tamino in the Magic Flute, who wants to spend them without question, will be permanently close ones of truth. The ostrich is their emblem, the sand, their symbol.
I recommend this book without taking it for a truth, but as support for "ask" a moment on yourself and wonder aloud. Do it, even sick, it is certainly part of the insured healing.