The means replace the end; loyalty substitutes for result; the group replaces life. That is no accident: the only true product of a cult is group members, desperately telling each other that they are an elite with the only answers to life’s questions. It becomes normal and commonplace to substitute certainty in place of truth, group loyalty in place of informed decision. As time goes on, one needs to believe in the group agreements in order to justify what he or she has done, the trashed families and so on.In such an environment, one is prevented from developing realistic understandings of self and the world.
(from Bob Penny's Social Control in Scientology)