I call PD 39 “the doctrine of eumetry”, a term coined by aesthetician Panayotis Michelis to denote a non-mathematical and non-symmetrical harmony that can at times even be superior to symmetry–which is often considered an important standard in aesthetics. Michelis was saying that sometimes beauty can be measured in non-standard ways. French philosopher and historian Michel Onfray adapted this neologism for use in ethics. It comes from the Greek “eu-” (good) and “-metry” is related to measure, or distance, so that it implies keeping “a good distance”, or keeping “a safe distance: not too close, not too far”, as Onfray puts it. Knowing the right distance to keep with others helps to procure peace of mind.