Proof…
A. Anything always having been is impossible, for then there is no definition point, which is still true even if it is claimed to somehow be timeless. William Lane Craig got this far, noting that the universe had to have a beginning, but he forgot that all existents must have a beginning, whether electrons, ‘Gods’, or whatnot—any entity. Thus, they must be created, and thus cannot be the First and Fundamental. Yet, there is nothing to make any entity of, which we will get to later. Nothing is not anything.
“Wait!” Some might say. “Why not forever entities? Say more.”
Well, then what would determine its amount, its form, its properties, its ‘where’, its ‘when’, etc. In other words, the entity(s) would have been already made and defined without ever having been made and defined in the first place (that never was). They would be unmakeable, and thus unbreakable, as in having no parts, almost as in string theory, or maybe that is what they say.
So, again, entities must be created.
“Say more.”
Then the basic entities hereabouts or the same making up composites are the same exact ones as there always were, which is fine, but that is a set, certain amount, and they operate in specific ways; yet, why not more or less of them, etc?
B. OK, so what creates the base entities? Not by another entity, for then we were not really speaking of the base entity. So, they have to come from no place, which is a lack of anything (nothing). Some might call this ‘causeless’. We already knew there was nothing to make anything of, so we are not surprised. And we’ve already shown that entities cannot have been forever, which was even enough by itself to lead us here.
“Well, OK, but it would be nice to confirm it.”
C. The zero-balance necessity begets the conservation laws of energy, momentum, and angular momentum—of point-of-view invariance, as discovered by Noether.
Nature demonstrates a zero-sum balance of opposites, such as with gravity vs mass, polarity of charge, matter and anti-matter.