This is something that I somewhat believe, depending on who explains it and how.
It certainly relates to what some other people have as an outer body experience through various practices, including the couple I had a few years ago:
^ As this explains in a basic nutshell the common concept of this, I also see it as a very blown up version of a combination of Atoms..... sure we have a basic explination of what makes up atoms in our universe, but what makes up those things which make up an atom..... and what makes up those things? And so on? Eventually you will come right back to the start of the question and answer it with your own existence.
I like to think of it as "The Other Side" ~ The other side being the inside of an Atom, and our current existence and what we know of the universe being the outside of an atom.... or more accurately the inside.... if that makes any sense.
^ First experimental image showing internal atomic structures.
Looks similar doesn't it?
As we live and function in this existence, we are viewing from one side of this realm, while when we die or move on from what we currently know, we then see things from the inside, or perhaps both sides.
It's a tad complicated to explain, as no matter which side you talk about, it is both the inside and outside at the same time.
Speaking of time, time is also subjective within our current existence as we know it day in and day out compared to outside of this current life. What we understand as hours, months, years, centuries, eons, etc.... could very well only be a fraction of time in comparison to the life of the atom.... AKA: the bubble our universe exists in..... the Atom/Universe was created from the big bang as they say, and that atom/universe is extinguished when the big squish occurs, if that ever does..... then another Big bang occurs and creates another universe/atom.
So in a sense, when those druggy hippies say that we're all one and connected to everything in the universe, in a sense it very well could be true...... just not in the exact sense most would think.
Our existence creates the balance of the existence of the atom, and vice versa, therefore life is eternal.
Good ol' Albert also once said that he did believe there was an afterlife.... or more accurately, something beyond this life...... as energy is always constant.... when energy goes from one object, it has to go somewhere else.
Meh.... I had a more clearer explination written up somewhere a few years back, but this is only one part of what I collectively believe is the purpose and reason for our existence.
Call it BS if you like, but it's no more BS then any other concept currently out there that can not be proven.