I'm afraid that the question is oversimplifying what is at issue... specifically Eternity.
Eternity, or Forever is a very long time! The vast majority of people never really stop and think about what the consequences of eternity would be.
Think of it this way: With the known laws of quantum physics, it is possible for a particle to pop into existence out of nowhere. It is also possible for an existing particle to vanish from where it is and instantaneously reappear on the other side of the universe... for no reason what so ever. It just happens to random particles at random times.
Particles are popping into and out of existence all around you right now. Every once in awhile one of those particles will not vanish. It stays here in our universe. Given enough time multiple particles will pop into existence near each other and form an atom. Given even more time more particles will pop into existence to form a molecule.
As trillions of trillions of years pass, the laws of probability INSIST that EVENTUALLY a cat will appear out of nowhere right in front of you.
As trillions of trillions of years pass, the laws of probability INSIST that EVENTUALLY an exact duplicate of yourself... as you were at the age of 12... will pop into existence in front of you.
... and then a purple unicorn.
... and then a perfect duplicate of the earth as it existed in 1492... allowing you to watch Columbus land in America for the first time. (Yes... eternity creates time machines.)
My point is this: When you bring an infinity into any equation, very odd things start to happen. Because of this one must question whether or not eternity could possibly even exist. If an eternity were to occur, it would mean that anything and everything that could possibly every happen... WILL HAPPEN... and it will happen over and over again for all eternity.
That's just BIZARRE!