Garbage from a cult leader.
A person researching religions could waste less time to just to look at Buddhism, for that is what Scientology is. L Ron Hubbard loved Buddhism. Scientology also has many links to Gnostic thought. One could also draw many parallels with Mary Baker Eddy's cult, "Christian Science" which is neither Christian nor scientific.
The basic premise in this book is that our life, now on this earth (or rather what we perceive to be our life) is just a game. "One could say, then, that life is a game" (pg 72) "Life can best be understood by likening it to a game. … it might strike you as peculiar that people would go on living or would enter into the 'game of life' at the risk of all the sorrow, travail and pain just to have something to do. Evidently there is no greater curse than total idleness." (pg 62). It is a state of consciousness that we enter into willingly but upon condition of forgetting. "In para-Scientology there is much discussion about 'between-lives areas' and other phenomena which might have passed at one time or another for heaven or hell, but it is established completely that a thetan is immortal and that he himself cannot actually experience death and conterfeits [simulates] it by forgetting." (pg 92) He states this premise of life being a game 25+ times in this book as if to drill it into your head, that we as thetans (immortal spirits or gods that pre-existed our material birth) entered into for something to do, out of a state of boredom; a game to play to challenge us. "[Scientology] is intended as an assistance to life at large, to enable life to make a better civilization and a better game." (Pg 97)
Like Gnostiicsm or the Doctrine of "Maya" in Buddhism, the reality that we see or think is real is not real. You know sort of like the Matrix movies (whose writers said was written in large part based on Buddhism). Hubbard states on page 23, "Reality is the way things appear. Reality is apparency. To do anything about reality, one must search into and discover what underlies the apparency." But his definition of apparency on page 20 is "Apparency = appears to be, as distinct from what actually is." So Hubbard is speaking doublespeak. Inserting his own definition into his statement then, he is saying "Reality is [what only appears to be, as distinct from what actually is]."
Reality is what only appears to be but is not real?
Does that sound like a sane man? Or an insane man?
Fortunately Hubbard clears this up for us (sarcasm) on page 26, Hubbard says, "For example, a man is sane. He gets the idea that it would be better to be insane. He starts to go insane (having created it) and then does numberless things in order to stay sane. Here he was already creating the state of sanity. He counter-created insanity. He then counter-created sanity against insanity.
The theme of reincarnation is apparent! in this worldview, though L Ron never uses the word in this book. But in this scheme it is not reincarnation proper but more of using up "lives" in a video game idea or that in this dreamworld dying is called a-"Wake" which these gnostic interpreters think means actually waking up to the actual reality. In the chapter entitled "The Parts of Man" where Hubbard describes his gnostic or platonic view of our real selves living in these temporary and disposable material bodies, he says, "the person, having exteriorized [astral projection/ out of body experience type of idea or as he says on pg. 85, "exteriorization or the departure of the soul"], usually returns to a planet and procures, usually another body of the same type of race as before" (pg 92).
To finish this review, I'd like to finish with Hubbards words on page 168, "Scientology does not owe its help. We have done nothing to cause us to propitiate. Had we done so, we would not now be bright enough to do what we are doing."
As a Christian, I found this comment with the word "propitiate" interesting. What does the word mean? Oxford dictionary defines it this way, "the action of propitiating or appeasing a god, spirit, or person." So Hubbard must either mean that they don't need to appease, or apologize to anyone because they have done nothing wrong. Or on the other hand he may mean that they have no need to make a sacrifice to God or gods for anything they have done.
In pagan religions, people sacrificied to gods, some even to the point of throwing babies into the river, Ganges, to appease the gods. In Christianity in contrast, God himself in the person Jesus Christ made propitiation for our sins. This is mercy. This is grace. You can read more about this in Hebrews 2:17, Romans 3:24-26, 1 John 4:10, and 1 John 2:2.