Ummmm.....
Exactly what Big Bang Scientists have claimed the universe is "perfectly harmonious?"
I seriously doubt you have the ability to even enter a discussion of the "boundless" issue (that is, the expanding universe is an expansion of space-time itself, so there isn't some border where you step "out" of the universe) so I won't even try.
And you can literally listen to the cosmic background radiation left over from the Big Bang. It's actual, real-world evidence.
Oh, I get it now. They claim the universe is not perfectly harmonious. That explains it all then. hehehe
Yeah, and if you listen to sea shells you can hear the ocean. Thanks be to God I don't listen to you Big Bangers.