" Where thinking is isolated without free exchange with other minds and can no longer expand, delusion may follow. Whenever ideas are compartmentalized, behind and between curtains, the process of continual alert confrontation of facts and reality is hampered. The system freezes, becomes rigid, and dies of delusion. "

― Joost A.M. Meerloo , The Rape of the Mind: The Psychology of Thought Control, Menticide, and Brainwashing