The light body is not a body in the usual sense of the word. When we think about a body, we tend to think of a certain fixed form. In fact, whenever we refer to any of the subtler body emanations, whether it be the subtle body, etheric body or whatever else, we talk about a certain field of information rather than a fixed limited form.
Even if we think about how energies, that are clearly non-physical, can be sensed and perceived through the physical, those energies are still not solely limited to the physical. It is just that our perception is so inextricably bound to the gross that all perceived phenomena naturally seem to fall one way or another into the prism of a gross physical perception.
The light body is not a body at all. It is the Natural Being that is beyond, and yet is at the same time, the existential substrate of all conditional manifest perceptions. The light body is our real body that is the formless Existence. When we connect to that formless, immortal and infinite body, then it naturally has an impact on the other grosser bodies, or grosser dimensional emanations of Being. The more one refines and aligns oneself with that Being, the more one transforms the other bodies, and those other bodies gradually begin to assume the qualities and emanation of that supreme body of light.
Through the processes of deep gross and subtle refinement, and through stillness and absorption we are able to activate the subtle light essence and refine it through the connection with the Ultimate Being. This Being nourishes the subtle body and gradually enlightens it through the refinement process.
The phenomenon of refinement initiates profound yet gradual bodily transformation. Hormonal and metabolic changes result in the rejuvenation of tissues, organs and systems. Everything about the body simply becoming lighter, less dense and more transparent. On an atomic level the very matter of one’s body is changing, becoming more subtle and less bound by the heavy gravitational field of the current collective manifestion. One begins the process of dissolving the body into pure light-space.
The more one goes into the process of unbecoming, and the more one cultivates selflessness and an equanimous perception of the Reality, the more one matures one’s spiritual individual essence and the light body becomes mature and autonomous. When one’s subtle body is mature, one’s being can live as if in two modes, switching from gross to the subtle. This way the body may appear as gross but has qualities of the subtle; it may be light, levitate and pass through physical barriers. Siddhis of such kinds are not separate from the maturity of the subtle body. Yet, many people employ entities to mimic such abilities and mesmerise ignorant crowds. There’s a big difference between truly accomplished Siddha yogis and fakirs.
The light body can be activated through awakening to one’s Natural Being, but it doesn’t guarantee accomplishment. Mostly, the accomplishment is possible by the grace of inner purity and Siddha Param-Para, and as a result of one’s natural evolutionary experience. The light body is there as a fact, at the root of our existence. But the real science of Siddha alchemy is in using the experience of that light body to enlighten and eventually completely dissolve the other grosser bodies, leading to a gradual ascension in one’s multidimensional comprehension and experience of Reality.