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Why is the content of Scientology OT-level training restricted?

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Father of Scientology — Scientology L. Ron Hubbard's seminal – and controversial – work was *Dianetics: The Modern Science of Mental Health*, written in 1950.

The content of Scientology’s OT-level training is restricted because the church considers these materials to be confidential sacred scripture.2

Access to these advanced teachings is reserved exclusively for church members who have reached the state of "Clear" and are undergoing the specific training required to perfect their abilities as operating thetans. By limiting this information to those who have progressed through the necessary preparatory stages, the church ensures that its "spiritual technology" is used only by those who are actively working to rid themselves of engrams acquired over millennia. The Religious Technology Center holds ultimate ecclesiastical authority over these teachings and is responsible for ensuring that the church’s procedures are followed fully and properly.1