Matter / energy is one substance. Or it is God, if you chose to see it that way.
That may be convenient to believe given your pantheistic leanings but it really is more complicated than that.
If the entire universe is the summation of a single manifest being called god, then the obvious conclusion is that natural law that governs all substances are merely properties of this substance, no?
And if they are merely properties of substance, then logic itself is merely a way to describe these properties, no?
Which begs the question -- from where does fallacy come from? In fact, one can ask basically the same question regarding all ideas that arise independent of any empirical phenomena -- mathematics, ethics, aesthetics, etc.
Or the void from which the Big Bang came, if you can see it that way. All the same.
The problem with the word 'void' is that there is nothing in the human experience quite like it. Personally, it vexes me just thinking about this concept of absolute nothingness.
If you imagine void as the empty space inside, say, a box, then you are imagining it as merely a property of the box. Without the box to describe it, what exactly is that empty space?
And if you imagine it to be vacuum, then, it contains very small irregularities akin to the grain or texture of a blank sheet of paper -- these irregularities obviously being 'something' that is supposed to be describing 'nothing'.
And if you have given up looking for an example in nature, you go to the realm of ideas and you get euclidean space -- a nothingness that extends infinitely in all directions. Except that a cardinal direction is itself, something, and this alleged nothing has an infinite number of cardinal directions to describe it.
And so, you try to compress euclidean space to a single dimensionless point, except, we simply cannot comprehend such a point without the region of nothing that surrounds it.
So, when you've gotten around this logical dilemma, please let me know.