It is connected to sensory deprivation, to my opinion
3.15 Questioner: Well, then you speak of the pyramid, especially the Great Pyramid, I assume, as primarily a healing machine and also spoke of it as a device for initiation. Are these one and the same concepts?
Ra: They are part of one complex of love/light intent/sharing. To use the healing aspects properly it was important to have a purified and dedicated channel, or energizer, for the love/light of the Infinite Creator to flow through; thus the initiatory method was necessary to prepare the mind, the body, and the spirit for service in the Creator’s work. The two are integral.
3.16 Questioner: Does the shape of the pyramid itself— is that a key function in the initiation process?
Ra: This is a large question. We feel that we shall begin and ask you to re-evaluate and ask further at a later session, this somewhat, shall we say, informative point.
To begin. There are two main functions of the pyramid in relation to the initiatory procedures. One has to do with the body. Before the body can be initiated, the mind must be initiated. This is the point at which most adepts of your present cycle find their mind/body/spirit complexes distorted from. When the character and personality that is the true identity of the mind has been discovered, the body then must be known in each and every way. Thus, the various functions of the body need understanding and control with detachment. The first use of the pyramid, then, is the going down into the pyramid for purposes of deprivation of sensory input so that the body may, in a sense, be dead and another life begin.