Hi Nano,
It is not as complex as you might think. Here are a few ideas for you the chew on:
One can never know just how mind boggling creatio ex nihilo is until you wrestle with the numbers involved. The best we humans can do in attempting to describe “creation from nothing” is to invoke the big bang theory that proposes that the entire universe emerged in an explosive manner from and infinitesimal object called the singularity. The scope involved in such an event is beyond imagination because try to imagine squeezing the universe that weighs 10^+53 kg into an object the size of the Planck length = 10^-35 m. That’s an awful lot of matter squeezed into an infinitesimal object.
The big bang theory proposes that not only the matter that comprises the universe emerged from the singularity, but so too did space, energy, and time. The emergence of space is an intriguing thought in that it is impossible to imagine anything from which “space” emerged other than a something that is “space-like”. However, if one thinks long and hard about the big bang as it relates to creatio ex nihilo, space offers the best hope for an explanation. Consider:
Only 5% of the universe is matter. Dark matter and dark energy are abstractions created to make sense of the current equations of physics and they too can only be space-like. Furthermore, since the hydrogen atom, a single proton “circled” by a single electron, is 30,000 times the size of the proton that consists of three quarks and since electrons and quarks are point particles, the universe that is mostly hydrogen is virtually empty. The idea that the universe is virtually empty makes it easier to believe that there is a plausible explanation for creatio ex nihilo.
For example, if you assume that objective reality is constructed from discrete space that emerged from an infinitude of continuous space. Since the universe is finite, then the universe could be constructed from a finite amount of discrete space. Discrete space is composed of dimensionless points, therefore, a finite number of discrete points, however large a number of them, would still be be dimensionless. Thus the entire universe came from what from a physical point of view is “nothing”.
I helps to have an understanding of the mathematical view of infinity to understand what discrete space and continuous space are.
Yppop