As regards the question you asked in your letter about a concealed group of masters in the Himalayas or anywhere else, there is no foundation whatsoever for this in the Bahá’í Writings. We as Bahá’ís must not believe in the divine origin of any such things which have not been mentioned in our own Sacred Scriptures by either the Báb, Bahá’u’lláh or the Master. There is nothing whatsoever to lead us to believe that there is any foundation or truth in these mystical stories of beings that are ‘behind the scenes’ so to speak. We must avoid such thoughts and teachings, and try to wean others away from them as we give them the Message.
(Shoghi Effendi, Lights of Guidance, p. 519)