Criticism of the Mystery Book of beyond Johannes Greber.

At the time this book was written, it was visionary. I was interested by the journey of its author and défits he has faced in its message. For there is indeed a message, in my opinion addressed to all religious faiths and humanity.
I can not say, of course I am in agreement on all the ideas advanced by the author and in particular on the meaning it gives to the forfeiture of the spirits who are far from God. Although the theses of the author are not consistent with some theories developed by the literature called "New Age". They nonetheless ahead of their time and newsworthy.