Georgina,
By volume of existence I am assuming you mean that it is an absolute void with particles and electromagnetic radiation from those particles moving and perhaps colliding with each other. There is no physical connection between any discrete mass or emission other than the subsequent coincidence of ballistic collision or absorption and/or refraction of EMr. And all that we are capable of observing is only a small portion of what is actually actively in existence and observable due to clever contrivances of reception devices or the same responsiveness inherent to human sensory organs. That is your contention (paradigm) of what the existential reality is; am I concisely correct so far? And that there need be no other agency for a particle to be an observable distance from another if there are sufficient EMr emissions recieved, and that time is simply that which we experience as an assemblage of sensory perception and mental processes. Am I correct in that? best jrc