I like this quote about this from Stephen Hawking: [1]
> "One can regard imaginary and real time as beginning at the South Pole, which is a smooth point of space-time where the normal laws of physics hold. There is nothing south of the South Pole, so there was nothing around before the Big Bang," Hawking said.
My layman's reading of that imagines if you move south, get to the south pole, and then keep going the same direction you had been going, you are still moving but no longer going "south." In this metaphor, you could go back in time, be "at" the Big Bang, keep going the direction you had been going in time, but the direction you're going would no longer be "before."
I have no idea how practical this metaphor is and how far it extends, but it's an appealing one to me. Maybe someone else could clarify.
What if our reality (and universe) is on the same journey as the one you just described? What if the North Pole is our starting point (Big Bang), we walk southward and as soon as we cross the South Pole, everything reverts back into the Big Ben (you would eventually reach the North Pole again) just to start all over again. Like a piston, or a ballon that is being inflated, then deflated and re-inflated again; our reality is just "one stroke" (or "walk", in your metaphor) of a bigger "engine".
> "One can regard imaginary and real time as beginning at the South Pole, which is a smooth point of space-time where the normal laws of physics hold. There is nothing south of the South Pole, so there was nothing around before the Big Bang," Hawking said.
My layman's reading of that imagines if you move south, get to the south pole, and then keep going the same direction you had been going, you are still moving but no longer going "south." In this metaphor, you could go back in time, be "at" the Big Bang, keep going the direction you had been going in time, but the direction you're going would no longer be "before."
I have no idea how practical this metaphor is and how far it extends, but it's an appealing one to me. Maybe someone else could clarify.
[1] https://www.cnet.com/science/stephen-hawking-tells-degrasse-...