ARC BREAK, 1. a sudden drop or cutting of one’s affinity, reality, or communication with someone or something. Upsets with people or things come about because of a lessening or sundering of affinity, reality, or communication or understanding. It’s called an ARC break instead of an upset, because, if one discovers which of the three points of understanding have been cut, one can bring about a rapid recovery in the person’s state of mind. It is pronounced by its letters A-R-C break. When an ARC break is permitted to continue over too long a period of time and remains in restimulation, a person goes into a “sad effect” which is to say they become sad and mournful, usually without knowing what is causing it. This condition is handled by finding the earliest ARC break on the chain, finding whether it was a break in affinity, reality, communication, or understanding and indicating it to the person, always, of course, in session. (LRH Def. Notes) 2. an incomplete cycle of some kind or another. It’s a lowering of Affinity, Reality and Communication, so we call it an ARC break. It’s a sudden down curve. It’s a highly technical term. It means exactly what it says but its incept and so forth is an incomplete cycle of action. (SH Spec 65, 6507C27) Abbr. ARCX.
Hubbard, L. R. (1975). Dianetics and Scientology Technical Dictionary, Los Angeles: Church of Scientology of California Publications Organization.