I don't believe in a god and I'm not sure I believe in the concept of a soul. I guess that depends on how you define soul. If there are different universes, I'd imagine that each me is an individual not tethered to the next me by anything other then genetic material. Wow, it really is interesting to think about, a lot of what ifs and maybes and wouldn't that be cool! I hope one of my alternatives is a good pianist. I always wanted to play the piano.
We tend to break the world down into bite sized chunks. It's not really broken down that way. But our abstractions are probably closer to reality than the bite sized chunks we perceive at any given moment because our abstractions are where we try to reassemble it. So what we think of as abstractions are, I think, more real than what we think of as concrete and tangible.
But I suspect a math problem (or even a riddle) is probably closer to the physical reality of the universe than Lego blocks or 3 dimensional models would be. The universe is very intangible.
I think I get it, maybe. What you're saying is that the math we use to describe physics is probably closer to reality than the sense I have that my laptop has weight, density, and a specific feel to it. My sense of that is an illusory construct, but the math that describes that is real.
Also, I wouldn't at all limit our perceptions to our sense perceptions (in the sense of our bodily senses).
Well no, I also believe we have extrasensory perceptions as well, but the physical universe is made up of what we can see, smell, taste, hear, feel, or measure with physical monitoring devices. Our emotional sense, our intuition, or empathy and sympathy, our ability to anthropomorphize, or sense of the divine, our thoughts (to the extent of the content of them), are also real to me and help form our perception of the universe, but they're harder, if nor currently impossible, to accurately measure and describe. They're just things we sense, things we know often without understanding how we know them.
EDIT: Or real-ish. I don't think reality has discreet parts. You'd have to take in the whole thing at once to experience the reality of it. But the math is, potentially, a better reconstruction because it takes in more observation and types of observation... and because it's focused on patterns rather than isolated evidence. Senses are easy enough to trick. Logic that holds up is as good as it gets with human limitations, though.
On the darker side, if everyone's choice sets of a new parallel universe, well, you or me deciding to walk instead of take public transit, put in overtime or take a sickday... probably at most gives us Sliding_Doors. But when you think about political decisions by world leaders... on how many Earths would you say that the Cuban Missile crisis ended differently? Or someone used a smallpox bioweapon? The multiverse might be a lot smaller than we think...