"The intercourse with the spirit world of God - its laws and its purpose, self-experiences of a Catholic priest" by Pastor Johannes Greber
Like the Jehovah's Witnesses Johannes Greber only buries the treasures of his own, of his self-experienced, non-to-God-oriented. The subtitle of his book reveals the betrayal of God and man. Quite as a matter of course, the coming-out is given: I made it myself and you all can the same. There is not the slightest trace of a question to God, no thought of asking what God says to do so. The Word of God is not read with the question at the heart whether Spiritualism is okay or not, but the Bible is mined for points that can be abused for the own spiritualism pointed pleasure.
This attitude, one could make it even oneself, manifests in Greber and in the writings of the Jehovah's Witnesses. Greber and the Watchtower Society are twins in the matter of reshaping the Bible. What does not fit is made to fit. How callous must be a man to indulge in such methods to distort the word of God and then also advertise for this falsehood!
One example of Greber's method to abuse the Bible for his own purposes, is at the top in his book ...
Personal experiences in the field of spirits manifestation
My first step in connecting with the spirit world
... directly after the title of the first chapter:
So I began to think, then, understand this: but it was too hard for my understanding, until I came into contact with the spiritual world of God. Ps 73,16-17
"In conjunction with" is a frequent term used by the Watchtower Society, which it always uses when Jesus is saying that He must be in us and we in Him. This term occurs in the NWT so abundantly that the paper probably had to be made thinner, so that the textual changing is not even noticeable from the outside. This frivolous textual changings, motto "it sounds so similar to" grow in the "Bible" of Jehovah's Witnesses like cancer. And Greber applies himself well to this method, making the Bible wax in his hands.
Which is currently in the original word that Greber translates here with "Spirit World", is "sanctuaries" andmeans sainthood, sacred place.

If one looks up the meanings of the word sanctuaries, you get everything - from chancel to holy place, but never something that could even remotely have anything to do with spirits or a spirit world. The transformation of meaning, which is made by Greber, leads away from the shelter of God into a kind of intellectual sphere of influence, which you can tap energeticly. The Sanctuary of God is altered in Greber imagery into a kind of spiritual oil well, that calls for being exploited. Greber's reconstruction of the word is aimed at the self service of man with the power of God.
While the experiences of a true Christian with Jesus repeatedly show that Jesus is not usable, Greber and the Watchtower Society find an almost scientific way to take God in use for themselves. Greber's experiments are presented as repeatable and Greber, as well as the Jehovah's Witnesses live by the idea of making themselves God available. The Watchtower is full of cliches, how useful the Bible was and how useful it was to work out to the favor of Jehovah.
Fortunately, the life, Jesus, happens on a real different wavelength. Jesus Christ is not subject to human use and does not estimate like a business or entrepreneurial activity. Jesus lives out of Himself and gives his strength to those who have noticed, that they cannot spile Him, but they must give themselves to Him. Not he who cuts off his toes, so that the shoe fits, is gaining life, but whoever gives himself as he is. Jesus takes each person without demand of advance or anticipatory measures. But Jesus gives a change that comes from within and so the Christian is always aware: I have not done it! Jesus did!
Quite contrary to these Christian experiences think and process the Jehovah's Witnesses and all the many esotericly oriented religious practitioner. They knit an own god, give him a name and change - as clever as they are - the Bible. The product of these spirits seekers is always interested in self-experience, in making it by themselves, in the ascent of the human being in perfection. Began at the perfected Freemason continued by the most holy in gold and purple sitting Pope culminating in the strained Jehovah's Witnesses romp the esoteric and the worship of idols in the race to feed themselves even more glory (and benefits).
But that a guy named Jesus said, he who humbles himself will be exalted, this is submerged in the religious cult. While Jesus lived his words to the deepest imaginable depression, the world of religions sets itself on ever higher thrones and flights of worship. The budding Jehovah's Witness has to study at least three years, until he can ask to become a member of the club of elitism. The Christian, however, speaks a single honest prayer to Jesus and is saved in his dependence on grace.
While Greber still clearly recognizable deals with demonically obsessed media, the Watchtower Society has Christian painted their demons religion so that anyone hardly comes to the idea, the Jehovah's Witnesses could be representatives of Satan. Even the Jehovah's Witnesses do not usually know whom they serve in reality. Even the many demons that appear in the illustrations of the Watchtower magazines, are not sufficient to induce thinking a true Jehovah's Witness. Anyone who has tasted the salt lick of the demon penetrated elite, can no longer escape his wrong-directed search for truth. He has committed himself to a cause, of which he hopes it were useful. That God does not let capture Himself in this benefit-thinking, he is unaware totally.
Greber and with him all the esoteric and all religion that is exploiting Jesus for its own purposes, are going on the broad road of selfishness and self-experience. The trust, which is the own of a real Christian, they never met. The confidence of the true Christian is the faith in Jesus, which says: Lord, lead me, even if I do not understand the meaning. Take me and heal me, even if I do not understand really and cannot do anything about it. Reign over me, even if I cannot capture anything from you with my human thoughts. For You are the decision maker, the everything dominant, the all bringing to life.
Every to the Jehovah's Witnesses seduced man is similar to the idolaters, who don't want to know anything about what Jesus is doing in our lives and who He is. They run an imagination which is not far from the Muslim conception of God. After God had revealed himself in Jesus, there was nothing urgent to do than the invention of many anti-religions which say: "Jesus is not God". They all have in common the self-experience.
Try once the practice of worship of Muslims. You will realize that this prayer technique is almost the same as the witnesses' service of preaching and spiritual world-views. You experience something, one feels something, one has done something, one has experienced something, one has taken an initiative. All of this is the opposite of faith. Faith waives the experience and practical ritual. Only Jesus provides facts, that then exceed, however, all what is human.