Energy transference can have many different sources and therefore meanings or realities.
For example most Body Workers, Yoga or Martial Arts practitioners think of Chi, Ki or Prana when they hear the term energy . Electricians, Mechanics and Engineers will have several other definitions or realities for what energy is. And taking it even further; Scientists, Physicists and Astronomers have yet another reality or variation of energy is, its origin and how it moves or transfers from one location, object or form to another.
We must also must acknowledge or realize that one source or type of energy transferring into another form of energy (such as electricity converting into heat), creates yet another energy form (radiance). This is true of any form or creation of it.
Yet all these energies, transferences, generations and conversions have a single root that is the essence and core of all universal existence. This singular essence is the Vital Point (Kyusho), itself.
Most people only think of themselves and their relationship to the world around them as opposed to conceptualizing the world in response to their actions and or thought.
In Kyusho people always ask how do I transfer my energy into the opponent?
But this is only a small portion of the equation, the should reverse engineer their thought thinking what is the structure in the recipient I am attacking and how does it respond.
This is a far better approach than the self indulged manner of thought as no one method is used exactly on all targets.
We must get past ourselves to gain the most success, not just in Kyusho, in all things. As example if you are trying to master Kyusho,you will never accomplish this alone, when you realize this and take the approach of helping others or integrating others, then you have a chance.
Please also read reverse engineering post.