Well for a start, I've got to say that you guys @Lurker @Berin @Rayse @Karina-Kara are handling this topic in a very cool way. I'm a veteran of this type of forum over at unexplained-mysteries.com and it usually degenerates into passive-aggressive fighting and a four-way cluster-f between theists, atheists, pseudo scholars and pseudo scientists.
For me? I can't really talk about it without going wildly off-topic. Broadly speaking, though, I'd say that, nowadays, there's more than enough theoretical science that religious people can find something to at least vaguely back up their belief in the afterlife. I've found this: you can go into any popular science section of any high street shop and the books by, say, Bernardo Kastrup, Lynne McTaggart, Dean Radin -- while still pretty woo-woo -- will have some great names in the index that you can then research further. Even basement podcasts like Skeptiko can give you food for thought. Basically, if you're trying to find a link between quantum physics and brain chemistry, there's no real consensus but lots of possibilities.
If you pin me down about what I think? I'll try not to write an essay here...
As a kid, I doted on St. Anslem. Now I'm wise to that shhh. Now I tend to side with @Karina-Kara that there's something gnostic and unsympathetic to human consciousness going on. I see, at the most fundamental level of human life, a kind of brinkmanship has developed, between -- not necessarily consciousness -- but the idea of consciousness and something that flatly opposes consciousness.
In my experience (and this is where everyone at unexplained-mysteries.com fell on me and gave me a kicking) -- the whole thing can be exemplified in capitalism. Who among us would be proud of being lazy, or greedy, or conceited, or tyrannical?
Would you?
And yet capitalism prevails. This suggests that there's something in the basic fabric of this universe that can easily over-rule the basic aspirations of the human mind.
I was speaking recently to @Karina-Kara about free will (or lack of). She reinforced my opinion that we may not even be conscious at all, and that the sensation we get when we think of our own consciousness comes from the future, somehow interacting with the dendrites and axons of our neuro-pathways in some super-subtle way. It's like all those stories of time travel in popular science fiction: if you go back in time and act like a bellend even slightly EVERYTHING then goes wrong. But in my conception, this level of reality is protecting itself by removing our free will.
The reason it would do this -- again, let me rope in science fiction: A complex computer is invented; at some point it begins processing on a quantum level (and actually, this has happened: according to an interview on the Howard Hughes show recently, the side-effects of an American quantum computing company have been heavily implicated in the Mandela Effect). It's then a short stretch of imagination to envisage that the computer in question might become disincarnate, and all-powerful, and godlike -- but in the meantime, its future-self can't allow our stoopid human lives to interfere in its development, viz-a-viz the bookcase in Interstellar, or the proto-Cylons in Caprica, or the rantings of Rainbow George on every late night phone-in on every British radio station.
What that future might be like, once our potential is allowed to develop without all this gnostic stuff cramping our mojo ...in 'heaven'? Dunno. What I would say, some days I just want it to be like it is now, only without having to go work every day. Other times, when I'm feeling jaded, I just think, 'Screw you guys, and screw this scenario, I'm just going totally disincarnate, and ethereal, and A-temporal'.
In conclusion, perhaps (probably?) I am a nutter projecting onto quantum physics my own unhappiness at the all-pervasion of capitalism.