The creation of the Universe.

[Banquo's Ghost]

So how could something be created out of nothing? That nothing must have caused the something in some way, and unless the nothing was a changing nothing, it couldn't have had built-in the potential of once giving rise to something.

In my limited understanding of the mathematics, the assumed logic that there must be something to give rise to something is a fallacy. The question of what was there 'before' is redundant, because time was created along with the big bang.

Counter-intuitive, I know, but then much of what we know about physics is.