Simple_Jack

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Even though this practice can be used to effect change on the energy body, it's not totally necessary to visualize the orb in the exact location or to even include the orb when you're first trying this meditation out. The main purpose of this practice is shamatha (which is why you dissolve the visualization at the end,) with other benefits such as cutting clinging attachment to the body. Though, once your concentration and visualization skills improve then it will be much easier to visualize an exact location of the orb.

Yeah, he probably should've clarified that sentence a little better, but once you have visualized the rib cage and spinal column: In order to further help bring the energy into the sushumna, visualizing a white glowing orb in between the rib cage and in front of the particular area of T6/T7 vertebra helps. The picture in his book "Twenty-Five Doors To Meditation," shows it in that area.

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....ehhhhh, I don't know if what he said in that letter can apply to everyone across the board....That was probably a response to a unique situation with certain individuals... Supposedly from a young age he was brought up learning the Chinese classics. After his military career he set out for retreat and to study under various Buddhist and Daoist masters in the Emei mountains. Afterwards, he spent a number of years in the Himalayas learning Vajrayana from various masters....This is definitely contradictory to what he said in his letter...

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