http://en.wikipedia.org/wiki/Proprioception

This is kind of basic sense or kind of basic functionality. we type without seeing, we catch a fast ball, juggle etc. actually not even something that complex even very basic thing like picking up a glass, keeping ur hand on ur lap etc need this...I am guessing this is like a continuous feedback to the brain about where every part of our body is. :-) Small kids cant put their finger into their mouth without seeing it. My nephew first stares at this thumb and only then can he pull it to his mouth! :D

This is the secret behind yoga! developing this sense is generally deemed important for spiritual advancement. Spiritual practices usually involve becoming aware of usually subconscious processes - like breathing in Pranayama and Meditation. Yoga is not just exercise, Yoga becomes much more than exercise only when u are aware of the sensations. Every yoga class stresses that u notice ur pose,feel ur entire body, Feel the stretch, feel the blood flow, notice how u feel, be aware of ur breath. What are they doing? they are trying to enhance our perception of proprioception. Which is usually entirely automatic and unconscious, slowly comes into the realm of conscious.

Robert bruce's NEW techniques - nothing but Proprioception enhancement. Feeling ur thumb, feeling a point inside of the palm, feeling that point moving along the skin, inside the skin... Again all this is very important for spiritual development.

why?

I can imagine why all this can be important to have Lucid dreams. Instead of ur dreams being just audio visual and probably smell, u will start getting more and more sensations. u can actually feel the walk and most noticeably - sensation of flying- seems to come out of this. Out of body experience is being able to carry this "sense of the body" totally out into imagination realm( or astral realm? for now I still stick with imagination realm). Wow!

But spirituality...?

Is spirituality a skill which is hidden deep in our sub-conscious, It involves peeling off of or rather moving more and more our subconscious tasks/actions into conscious realm, not only physical tasks and senses like this but also mental and emotional tasks. Is it like going from basic user of the brain to kernel programmer? Buddha and Jesus were hackers?

why does being aware enhance our well being? both mentally and physically.

I know that by Yoga and by Robert Bruce techniques u can improve health,many times miraculously. The metaphysical explanation is that it increased the flow of prana and obviously we get better. But from nerves and body perspective how does it help?