[Sgt_Schultze]

You have to also wonder how all matter, existing compressed in a tiny single molecule suddenly exploded. Why? With no additional matter and no additional change, why explode? Why not just remain? Also, the anti-theists need to explain where that matter originated.

[A_perfect_lady]

Well, one idea is that it exploded because perhaps nothingness is inherently unstable. It explodes, expands, and eventually collapses back. Explodes again, expands, eventually collapses back. Over and over. Always has, always will, and our whole universe is just one of these explosions. Of course, I can't prove anything. No one can. But it makes sense to me, and I consider it good enough.

As to where it comes from, I don't have to explain anything because theists don't explain it. ("God did it" isn't an explanation.) But I did listen once to a Canadian astrophysicist named Lawrence M. Krauss who gave a talk called "A Universe from Nothing." It was on YouTube. It made sense to me, although I didn't retain much, because I'm not really that interested. I think most of this debate is pretty pointless.