Me Myself
Back to my username
The universe is not eternal.
It has a start which is around 13 billion years ago
Anything which has a start is by definition not eternal
Only the "Cause" for bringing the universe into existence is Eternal
actualy, I think it is known energy of our that has a start then.
There is no reason to believe that energy wasn´t in some other place before that. Multiverse could explain an infinite multiversal "space" with finite universes.
If we defined the universe as the space before the big bang, then it could be eternal, specially if the energy actually existed before in a form that had been bound by different rules that the ones we know.
You claim to be certain of things you could not posibly be certain of, at least for the affairs of rational public consensus.