Switching to Subtle Energy (Astral Nutrition)
Moving the subtle body to a diet of subtle energy, astral prana, may be achieved by a yogi if he uses bhastrika pranayama and is aggressive in the practice. He must change the kundalini from spinal collective energy to micro cell bliss energy release.
Spinal Kundalini is supportive of a system in the astral body which has in it the blueprint for creating physical forms which have the tubal digestive capacity in the form of stomach, intestines and colon in the human form and a similar arrangement in the other animal species.
However so long as the subtle body has these tendencies, the idea of not taking another material body will continue to be a fantasy, a hope at best. Even to reside in the Swarga paradise world, one has to have a subtle body which can absorb a subtle liquid which is known as amrita bliss yielding energy. That is ingested through the mouth but it does not pass through a stomach-intestines-colon system. As soon as it enter the mouth it disperses through the subtle body and does not have to be processed as physical food is digested.
Usually, just after death of the physical form, a deceased human feels thirsty and hungry. Some who are lucky enter into the physical bodies of their descendants or loved partners, and experience the eating and digesting of those persons. Others who are lucky in another way, find themselves in an astral domain where astral plants and animals provide a similar dietary scheme which is similar to the one used in the last physical body.
To rid the subtle body of the need to develop physical forms for participation in the earth’s history, a yogi should change the energy consumption process of the subtle body, so that it can use breath-infused energy and be satisfied with that, with no craving for the astral energy which is took when it used a physical form and used the subtle energy which emanated from physical foodstuffs.
When doing pranayama breath-infusion practice, the yogi should stop periodically during the practice when the subtle body is fully charged. He should check the distribution of energy. Repeated identification with the charged subtle energy will in time, cause the yogi to grasp the energy with his willpower. This in turn will cause movement of the energy through the psyche upwards as contrasted to its downward which is the way for processing physical food. This will in time cause the disappearance of a subtle gut system which serves as a blueprint for physical digestion.