This is taken from Wikipedia. It is the theory that all Scientologists believe. This is the information that should help you debate this topic properly, with evidence and rebuttals.

Past lives, "Secret" Levels and Extraterrestrial beings

In Dianetics, Hubbard proposed that the cause of "aberrations" in a human mind was an accumulation of pain and unconscious memories of traumatic incidents, some of which predated the life of the human. He extended this view further in Scientology, declaring that "thetans" have existed for tens of trillions of years (several orders of magnitude greater than what mainstream science generally estimates the age of the universe to be). During that time, Hubbard says, they have been exposed to a vast number of traumatic incidents, and have made a great many decisions that influence their present state. Hubbard's 1958 book Have You Lived Before This Life contains descriptions of past lives given by individual Scientologists during auditing sessions. According to an early lecture of Hubbard's, it is, as a practical matter, both impossible and undesirable to recall each and every such event from such vast stretches of time.[87] As a result, Hubbard's three-decade development of Scientology focused on addressing only "key factors."
According to Hubbard, some past traumas may have been deliberately inflicted in the form of "implants" used by extraterrestrial dictatorships such as Helatrobus to brainwash and control the population. Hubbard's lectures and writings include a wide variety of accounts of complex extraterrestrial civilizations and alien interventions in earthly events, collectively described by Hubbard as "space opera." There is a huge Church of Spiritual Technology symbol carved into the ground at Scientology's Trementina Base that is visible from the air.[88] Washington Post reporter Richard Leiby wrote, "Former Scientologists familiar with Hubbard’s teachings on reincarnation say the symbol marks a 'return point' so loyal staff members know where they can find the founder’s works when they travel here in the future from other places in the universe."[89]
Scientologists who have achieved the State of Clear may continue onto the Upper or OT (Operating Thetan) Levels. These levels are available by invitation only after a review of the candidate's character, ethics and contribution to the aims of Scientology.[90] Individuals who have read these materials may not disclose what they contain without jeopardizing their standing in the Church.[90] Presently, there are eight such levels, OT I to VIII.[91] Church management has promised to release a ninth OT level once certain expansion goals are met.[92] The OT VIII designation is only granted at sea, on the Scientology ship, the Freewinds, which was established to provide a "safe, aesthetic, distraction-free environment" for this purpose.[93]
The organization says that it enforces confidentiality. Excerpts and descriptions of these materials were published online by a former member in 1995 and then circulated in mainstream media.[90] This occurred after the teachings were submitted as evidence in court cases involving Scientology, thus becoming a matter of public record.[94][95] In the previously confidential OT levels, Hubbard explains how to reverse the effects of past-life trauma patterns that supposedly extend millions of years into the past.[94]
Among these advanced teachings, one episode revealed to those who reach OT level III is the story of Xenu (sometimes Xemu), introduced as an alien ruler of the "Galactic Confederacy." According to this story, 75 million years ago Xenu brought billions of people to Earth in spacecraft resembling Douglas DC-8 airliners, stacked them around volcanoes and blew them up with hydrogen bombs. Their souls then clustered together, stuck to the bodies of the living and continue to do this today. Hubbard called these clustered spirits "Body Thetans," and advanced-level Scientologists place considerable emphasis on isolating these alien souls and neutralizing their ill effects.

Beliefs

See also: Scientology bibliography
Main article: Scientology beliefs and practices
Scientology's beliefs and related techniques comprise 18 basic books,[38] and 3,000 recorded lectures.[39] There is no single Scientology book that is the equivalent of the Bible or the Qur'an, but the study of Scientology is achieved through the chronological study of its basic books and lectures.[40]
Scientology describes itself as "the study and handling of the spirit in relationship to itself, others and all of life,"[41] and "encompasses all aspects of life from the point of view of the spirit" — including "auditing"[42] and training in morals, ethics, detoxification, education and management.[43]
Prime among Scientology's beliefs is "that man is a spiritual being whose existence spans more than one life and who is endowed with abilities well beyond those which he normally considers he possesses."[44] Scientology believes man to be basically good, that his experiences have led him into evil, that he errs because he seeks to solve his problems by considering only his own point of view, and that man can improve to the degree he preserves his spiritual integrity and remains honest and decent.[45] According to the Church, the ultimate goal is: "a civilization without insanity, without criminals and without war, where the able can prosper and honest beings can have rights, and where man is free to rise to greater heights."[46]
The Church of Scientology declares that the goal of Scientology is to achieve "certainty of one’s spiritual existence and [of] one’s relationship to the Supreme Being,"[47] and says that Scientology's tenets are not a matter of faith but of testable practice: "That which is true for you is what you have observed to be true."[48]
The exact nature of all of existence is said to be stated in Hubbard's Scientology and Dianetics Axioms.
Other beliefs of Scientology are:[49]
A person is an immortal spiritual being (termed a thetan) who possesses a mind and a body.
The thetan has lived through many past lives and will continue to live beyond the death of the body.
Through the Scientology process of "auditing," people can free themselves of traumatic incidents, ethical transgressions and bad decisions which are said to collectively restrict the person from reaching the state of "Clear" and "Operating Thetan." Each state is said to represent the recovery of native spiritual abilities and to confer mental and physical benefits.
A person is basically good, but becomes "aberrated" by moments of pain and unconsciousness.
Psychiatry and psychology are destructive and abusive practices.[50]
Members study Scientology and receive auditing sessions to advance from a status of preclear to Operating Thetan

Is scientology a brainwashing cult?
Should we really believe these stories with no actual primary source evidence?
Fact or Fiction?

I can't beleive in it purely because it was created by a science fiction writer.

LOL WIKIPEDIA.

Anyways, I believe it's FICTION. Written by some psycho son of a bitch.

I think its hilarious. And I also agree with Casper, it was written my a science fiction writer, seems like a story he wrote and got a little involved with it.

http://ca.youtube.com/watch?v=UrTrzsIxcXs

He he he he he he

http://ca.youtube.com/watch?v=rCGP-0545EU&feature=related

I found this

I want to know what you guys think.

and this
http://ca.youtube.com/watch?v=CgqKA3w6T2U&feature=related

casperONFIRE wrote: I can't beleive in it purely because it was created by a science fiction writer.

this is all you need to know.

And amazingly, there's a church of Star Trek, too.

What does that tell you?

All a bunch of crap.

casperONFIRE wrote: I can't beleive in it purely because it was created by a science fiction writer.

And that his "religion" is based on a tax dodge.

Nexus wrote:

casperONFIRE wrote: I can't beleive in it purely because it was created by a science fiction writer.

this is all you need to know.

And amazingly, there's a church of Star Trek, too.

What does that tell you?

Seriously?



That wizz is frsrsly wizzack. A CHURCH OF STAR TREK?

I don't think a 'church' should charge anything. I think that shows it's true colors of the way it functions. What does it care about more, the members or their money?

Xenomorph wrote: I don't think a 'church' should charge anything. I think that shows it's true colors of the way it functions. What does it care about more, the members or their money?

It was made as a tax dogdger, and collects from the brainless so they can do whatever they want.

Nexus wrote:

casperONFIRE wrote: I can't beleive in it purely because it was created by a science fiction writer.

this is all you need to know.

And amazingly, there's a church of Star Trek, too.

What does that tell you?

I think there's a "lord of the rings' one as well. Not to mention the "Jedi's"

FICTION!!
If only everyone could make their favorite book a religion.
I'd be a Harrypotterist.