Peter,
Think of it in terms of basic whole numbers, zero to infinity. There seems to be a tendency to treat fractions as another form of infinity, a la Zeno's paradox and to treat zero as little more than the point between positive and negative.
The question with physics though, is what is the primary state and how do we derive this complex reality from it. Many people like to focus on something, be it anything from a platonic mathematical realm, to a spiritual entity, to spheres, to photons, to singularities, to primordial intelligence. They all raise the question of where did the god/photon/singularity/etc. come from?
The only way to get beyond that question is to propose it all came from nothing. So what is nothing? Is zero a point between a particle and its anti-particle? What if there are many such dualities? Is there a field of "nothing?" If we can have a point as nothing, wouldn't it be worth considering nothing as a field? Doesn't it really make some basic sense, that rather than zero being the center point of the coordinate system, that it be the blank sheet of paper? The non-fluctuating vacuum?
Rather than the entire universe arising from a singular point of nothing, wouldn't it possibly make at least equal sense that nothing would be an infinite field underlaying reality? If every point in this field is potentially fluctuating, wouldn't that have the effect of expanding space? And since this fluctuation would be mutually attractive, couldn't it then collapse into vortices of negation? Isn't that effectively what we see, stripped of theory; expanding distances, interspersed by vortices of collapsing residual mass, which then pretty much radiates the energy back out across the vacuum?
So back to the question of why do I associate absolute and inertia;
For one thing, I'm considering a slightly different understanding of inertia. Conventionally inertia refers to an object in motion staying in motion. Yet this motion requires some initial force, so if we go back a step before even that initial effect, there is motionlessness. The idea of perfect motionlessness might seem meaningless in the context of a point singularity, but not if we are looking at this as a field. As the neutral state, this vacuum field is the zero point between all positive and negative elements.
With temperature, the absolute is the negation of all motion, yet not of space and what is inertia, but the absence of effect, even that of the initial effect?