Committee of Vigilance to watch over the Faith

"He feels that your Assembly should redouble its vigilance, in fact he feels that the National Assembly should consider itself, aside from its other duties, as a Committee of Vigilance to watch over the Faith and protect it from its internal enemies, and from the constantly carried on and insidious activities…."

(From a letter written on behalf of the Guardian to the National Spiritual Assembly of the United States, September 21, 1957)

https://bahai.works/Lights_of_Guidance/Believers_Forbidden_to_Associate_with_Covenant-Breakers