Chapter 23Inner Experiences in the State of Samadhi · The Trance of Mediums
Book 7. Part Three: Experiences of the Inner Consciousness · Section Two: Experiences of the Inner Being and the Inner Consciousness
The medium trance is of a different kind — they get not into touch with Sachchidananda but with the beings of the lower vital plane. To develop the power of going into this higher kind of trance, one must have done some sadhana. As to purification, entire purification is not necessary, but some part of the being must have turned to higher things.
Chapter Four
Three Experiences of the Inner Being