3.4 Experiential references / hal 37

colours, light ~ astral
purple light ~ astral space

As you practise the various techniques working on the third eye, you will encounter mainly 3 types of experiences between the eyebrows: 1) vibration, 2) colours and light, 3) purple light. Roughly speaking, the first one indicates an activation of the etheric layer, the second indicates the astral, while the perception of the purple light indicates that a connection has been made with the astral space (the terms etheric and astral will be developed further on in this book).
Of course these indications are far too simplified to be completely exact. But from an experiential point of view they provide helpful references to allow you to find your way in the beginning.
1) Vibration, tingling, a feeling of pressure, weight, or density, all have the same significance when felt between the eyebrows. They indicate that something is being activated in the etheric part of your third eye.
The etheric body is the layer of life force, equivalent to the prāṇa of the Indian tradition and the qi of traditional Chinese medicine. (The third eye is not a physical organ, it is predominantly etheric
and astral.)
The vibration (or any of its equivalents, such as tingling, pulsing, pressure, density...) is the sensation by which the etheric is perceived. Whenever you feel it somewhere in your body, it indicates that the etheric layer is activated in this area. So the perception of the vibration between the eyebrows is nothing other than a perception of the etheric part of the third eye.
Since tingling, pressure, density or weight have more or less the same significance, to simplify I shall refer to all of them by the same word: vibration. Therefore, whenever you read 'vibration' in this book, it refers to any or all of these different forms. For instance, "Build up the vibration between the eyebrows," means: build up the modality that is most natural to you - vibration, pressure, density, or their equivalent. Anyway after some time
the vibration will be perceived as all of these simultaneously.
There are different levels of vibration, just as there are different levels of etheric energy, some more subtle than others. The intensity of the vibration may vary from one day to the next. Apart from quantitative variations, it is also the quality of the



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