In quantum mechanics, one may come across a multiple universe theory or two, such as Multiple World Theory, and others. It could be Schrodinger's Cat, for example. Is it actually possible that the cat in the box is both dead, and alive at the same time, and that until one opens the box to look in, both possibilities are valid? Then, once one observes, the probability wave collapses into either the cat being alive, or deceased. Perhaps the cat was/is still both dead and alive right now. Perhaps it's dead in one universe, and alive in another.
The trick is, I don't see any inkling of multiple universes as standardly described in the Scriptures. I see multiple dimensions, but that is different than multiple universes. In order for the above cat scenario to actually happen, we have to add when/how it happens.
When we make a decision, does that collapse multiple other universes into ours; universes where we made all other possible decisions? Yes and no.
Let's turn to the first verse of the book of Genesis:
"In the beginning of God's preparing the heavens and the earth" -Genesis 1:1
Beginning - this can denote the beginning of linear time. Certainly Jehovah (which means 'Self Existent One') doesn't need any time construct in which to exist.
We see after the beginning, the preparing (creation - Hebrew bara) of the heavens. This could be when God created Aether. Aether has several different names, especially since the Michelson and Morley experiment disproved how they thought the Luminiferous Aether behaved. Most scientists strayed from the term Aether, but many still included it in their theories, just under different terms, and with some variations in its properties. Other terms for Aether being: The Fabric of Space, Absolute Space (pre-Michelson/Morley), and perhaps a field of strings in String Theory.
If we see that "beginning" is
the beginning of the arrow of linear time, creating a past, moving forward to
the present, and on to the future, and we consider the heavens being created
first with Aether to create a resonance field, then we may go further to apply
other quantum-like theories to the Creation account, such as how God spoke
things into existence. The resonance of the creative voice of God would
resonate the strings in the Aetheric field to then resonate to specific string properties, leading to specific particles,
attaching to other particles to create specific molecules, which come together
to create specific matter.
Matterless particles, such as photons, may actually be a reaction, or
excitation in the Aether, meaning the speed of light travels at the speed it
does, because that's the speed of Aether.
Now, coming back to multiple universes: There were/are/will be multiple universes, each has/is/will collapse into ours. There are no multiple universes and at the same time, there are a near infinite amount of universes, all collapsing into ours. The trick here is time - these multiple universes are all the past, the present, and the future right now.
When God created everything, he saw every possibility, and every decision everyone would or could make. He saw Hitler wining World War 2, and Nazi soldiers becoming a global police state. He saw Adam choosing not to partake of the Tree of the Knowledge of Good and Evil, which Eve still did. He saw neither Adam nor Eve partaking of the Tree.
Before our God was every possibility, and every timeline laid out, all at once. If this is true, then man had to fall. Adam and Eve had to sin, and Jesus Christ had to die on the cross. Why? Because God saw every single outcome to everything simultaneously. He saw which shirt you chose to wear today, which shoes you chose to buy at the store, the annoyed look you gave the bad driver you passed on the road, etc. He also saw all of your alternate choices, reactions, and decisions in your life.
In order for all the people in the
history of humanity who are God's children to be born, and then born again (saved,) all the other universes
had to collapse into this specific one: Our Universe. There is not
another me in another universe who is not saved. I was/am/always saved in every
single universe, and there is only one me. We are each our own person. There are not different us-es in different
universes, just possible, unplayed-out futures set by our making different
decisions.
Salvation pervades beyond time and dimensions. It is a universal, cosmic thing. When one truly gets saved, their resonance changes to match that of Christ's. Christ was sinless, and when we resonate to Him, we take on His sinless properties in relation to the cosmos. Meanwhile, He took on all of our sins, and cancelled out our sins with His Love and Sacrifice. Only God can do this, and He did.
I'm not propounding Calvinism, here. I'm saying every person who got saved, chose so in every scenario, unless they died before they could do so, or never got a chance. In this universe, every child of God gets the chance to become a child of God, and does so. Everyone who isn’t saved and doesn’t get saved, never chose salvation in any alternate universe scenario, either.
In order for God not to lose any of His children (except for apostates, because we all have free will) God chose the universe in which all of His children (who chose so) make it. This means our universe had to include the fall of man, and the death and resurrection of Jesus Christ, etc.
Since God is not bound by his creation of a linear time construct, nor is He limited to our four dimensions, He saw all possibilities, sees all possibilities, and will see all possibilities - at the same "time." He chose this universe, He is choosing this universe, and He will choose this universe, and it is all happening right now.
There are no multiple universes - just this one, yet there are an almost endless supply of multiple universes, but they have all collapsed into ours, and they are collapsing into ours, and they will all collapse into ours.
"And we know that all things work together for good to them that love God, to them who are the called according to his purpose. For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren. Moreover whom he did predestinate, them he also called: and whom he called, them he also justified: and whom he justified, them he also glorified." -Romans 8:28-30