When we emphasize the observer, our consciousness, there is no longer a doer who manipulates the body, who moves the body. There is a completely impersonal approach to the body. All tensions, reactions, even those deeply rooted in the body, have no more hold, and sooner or later this tension is eliminated and we become more aware of the energy body which underlies our physical body. We become familiar with the deep layers of sensitivity of the body and we come to know our original body. But knowing our original body is still more or less a by-product, because what is emphasized is consciousness, our presence.
When we emphasize the feeling sensation, we use our muscles in a different way. Our muscle is in antagonistic function. This means that in this movement there is an agonist and antagonist. In other words, there is one part of the muscle which contracts and the other which expands. When the muscle is wrongly used, there is an over-contraction and an over-stretching, but when we use our muscles with aware feeling, these over-activities are reduced and the muscles, in a certain way, come together and function harmoniously. Then you feel no more hindrance. So the body must become an object of our awareness. When it is felt—allowed to be feeling—it comes to life. This coming to life begins on the level of the skin with tactile sensation. I would say there is a resurrection of the flesh.
From Living Truth, page 91-92
Here you can read more from Jean Klein.