"Above-down-inside-out."
The beauty of this one is that it pretty much works regardless of your particular brand of chiropractic. You get to choose how high the "above" is.
If you're a mechanist, then the hardwired nervous system is merely what connects the end organs with the "above" of the brain. If you're more metaphysical, the "above" becomes God. Either way, it works.
When B.J. Palmer crafted this chiroism he used it to help distinguish between the underlying assumptions separating chiropractic from medicine. The use of drugs is clearly "outside-in-below-up." Changing blood chemistry to change function may be expedient and in certain situations even lifesaving, yet it's not a healthy, long-term solution and often reveals a profound mistrust of the wisdom of the body.
Notice that in this concise four-word statement the chiropractor isn't the hero. However, God and their God-given ability to heal from the inside-out, are.