The region of prophetic visions, clairaudient voices, and predictive messages opens up a veritable pit of possible illusions to the mystic. He must beware of the sights and scenes, the self-glorifying revelations which may present themselves to the mind during meditation. He would be better employed chasing such phantasmagorias from the mind rather than seeking to attract them! The mystic must put a stern check upon his imagination if he wishes to pass safely through his apprenticeship. The last word is that the course of meditation may or may not be accompanied by these occult phenomena. Neither does their addition improve the value of the mystic experience nor does their non-existence lessen it. Where they are genuine and authentic communications from the Overself, their value lies rather in personal but transient satisfaction or in immediate but momentary help.
-- Notebooks Category 16: The Sensitives > Chapter 12 : The Intermediate Zone > # 43