Perspective
If reality is ontological and epistemological, it can be known by reason, and this knowledge would give power in the physical realm. What Arithmoi posits, is that yes, reality is necessary and sufficient at its core, as it is the only way to ever be, and we can explain all phenomenological events with our Arithmoi mathematical method.
We say mind over body, and we say "un esprit sain dans un corps sain". But as we've seen here, the mind permeates spacetime and thus it is in fact that the body is within the mind, so it would be "un corps sain dans un esprit sain". Perhaps this simple change of perspective is alone sufficient to allow a living and active mind to unlock the secret of the placebo effect, at will, with intent, consciously, living and evolving. It would thus be in fact: "A healthy mind permeates a healthy body." Or in a simpler, and more direct way:
"A healthy body in a healthy mind."