Causal Plane / Brahmaloka Sensation Production
The first level which manifests from the causal plane, does so spontaneously and is not caused by a deliberate action of anyone. This is similar to how plants produce flowers, which convert into fruits, which ripen in time. Merely by growing the plants become altered in formation and produce fruits which part from it and fall to the ground.
The highest subtle level is termed as brahmaloka. It is the first level which manifest from the causal plane. Everything on the brahmaloka level, the entire environment, consists of sensation-energy only without grossness or physicalness as we know it.
A yogi may experience that level of his subtle body during meditation and during breath infusion practice. It is as if the subtle body is all sensation only. In a physical form we are aware of what flesh and bones are experienced as. The animals are also aware of this. We also experience sensations, either neutral, mild, regular or intense. These come from the nervous system and are the most acute feelings we have in material world.
To get some idea what it would be like to be embodied on the brahmaloka level, one may consider having a body which has nerves only. In other words such a body would be made of nerves impulses without any fleshy or bony parts.
When doing breath infusion, one may experience the subtle body in this way if one raises kundalini or if kundalini burst occur in a bunch of cells or in an organ or in sections of or the whole of the body.
Asana postures can be limiting especially if one does not do pranayama practice with the postures or soon after one practices postures. It is best if one could do the postures and the pranayama breath infusion together. That will give one some idea about the kundalini outlay and the spread of its energy through the psyche through the nadi subtle channels as well as through the central nervous system.
However in advanced kundalini yoga, one can learn how to go beyond mere stretches. One may do breath infusion in a limited number of postures with focus on the sensation yield one derives in the poses so that the infused energy goes to sensation yielding parts of the subtle body. One may assume postures and scratch with finger tips or dull finger nails the skin in various parts of the body and collect the sensations which are released to collect those sensations so that all polluted energy is removed from them and fresh energy from higher dimensions come into those parts of the psyche. If this is done to proficiently, one will in time experience what it is like to live on the brahmaloka plane of existence. One would get firsthand experience of what it feels like to be a resident on that level.
I was introduced to this by Upamanyu Rishi who said that it was a separate development for yoga practice, which was not divulged except to a handful of students before, even for thousands of years. A few great yogins developed it because they were assigned to stay on the physical or lower astral planes and needed a method of maintaining contact with the brahmaloka plane of consciousness to reach some supernatural person or persons there.
