Ok.
This is a good, short clip regarding 2 main points:
1) Center of mass.
Increased relaxation results in greater sensitivity and awareness of the body. One internal method to utilize – move, manipulate – the body is to keep focus on the center of mass – located below the navel – and connect the arms and legs to it. The focal point is the center of mass. The internal circuit is the connection of the arms and legs to it.
2) Relaxation.
This is extremely discreet. You will see on timestamp 00:15, the guys in the background touch the muscle connecting the chest to the shoulders to better relax the arms. This is called localized relaxation and it is – from my perspective, intellect, experience, and understanding – a total waste of time for beginners. It can be used as a tool only when one has achieved holistic relaxation. To holistically relax, focus on the chest.
The idea is not simply that of focusing on the chest but penetrating, piercing it to such a degree that one falls into a rabbit hole where one “accesses” the chest to even greater depths. As sensitivity improves, so too does the concentration. And vice-a-versa.