Reply #59: His explanation is just as valid as yours.

[trotsky]

The big bang was a quantum singularity. The funny thing about singularities is that the known laws of physics break down. We can't say anything about time, matter, energy, etc. "before" the big bang, because all those properties are fundamental to our universe. Perhaps the universe prior to ours was so fantastically different, and the one that follows ours will be even weirder! "Matter" in that case doesn't exist eternally, only for the duration of our universe's existence. "Problem" solved.

There are so many ideas, so many ways to think about this, that your limited answer of "god did it" (and illogically extending that to "MY god did it" is pathetically boring!