You need to think of the body as a massive biocomputer with every cell acting as a highly complex processing unit. On top of this, you have an incredibly sensitive electromagnetic field that allows interaction with all cells external to the body as well (people, plants, bacteria, etc.) This creates a massive biocomputer network that essentially networks everything on earth.

Your conscious mind is unable to connect to this complex network for a number of reasons including the fact that it's just too damn much information to process, however, part of you is always able to access this network. This is why some people are psychic, because they can consciously access this network. For the rest of us there is another possibility, this is called kinesiology.

Kinesiology works through using muscle strength testing as a subconscious mechanism to access this network. Think of it as a sort of lie detector attached to a massive network of people and your muscle strength as the galvanic skin response. (If you don't know what galvanic skin response is, have a look here.) So you are now accessing a massive network of information whether that be cells in your own body, or the cells of billions of other people on the planet based upon what you consciously choose to access.

It sounds pretty crazy, but after a lot of experience with, I can guarantee that it works fantastically.