The function of matter is to express force.
We know that force is created by intelligence, as stated by Principle #8. But when intelligence (our Innate Intelligence) expresses force, how does it manifest?
Through our physical bodies, otherwise known in this principle as matter.
Without matter, force cannot be expressed. If force cannot be expressed, it cannot unite intelligence and matter.
Some examples of force not being expressed could be, in the most extreme example, death.
In a less extreme example, a vertebral subluxation could hinder the expression of force. Interference to the nervous system by way of vertebral subluxation will cause an incoordination of function in various organ systems. Over time this may lead to atrophy, which will lead to a decreased expression of force, thus diminishing the unification of Innate Intelligence and the body.
Chiropractic removes this interference, allowing the intelligence of the body to create force that can be fully expressed through the healthy and/or healing matter that is your body.
It can happen no other way.