Well, this would be a lot more fun in person with a carb-heavy brewed beverage but here are some thoughts from my own life and head.
I was a serious believer for three decades and a laboratory scientist (biologist) for almost all of it. I did think about miracles, and talk about their implications with colleagues who shared most of my religious commitments. Many of these colleagues worried to some extent about barriers and separation and so on. Many others, like me, simply did not. For me, it was because I didn’t care about miracles. I was not a believer because of miracles, indeed I was probably a believer in spite of stories of the miraculous. Now, of course I knew that the miraculous reanimation of Jesus’ corpse was a brute “fact” of my faith, and in retrospect it seems to be the only miracle that I thought was worth worrying about. (Maybe also the ascension, but for me the “virgin birth” was not a big deal since Jesus had to have a Y chromosome from somewhere.) Even more important, I think, is the fact that I never believed (or, frankly, understood) the supernatural works of the Christian god, however rare or common, were any more noteworthy or awe-inspiring than the natural ones. It never mattered to me, not once in my 30 years as a bible-believing Christian, whether the wonders of the human brain could be completely naturally explained. To me, that was just as cool as — or frankly more cool than — some tinkery intervention story.
All of which is to say that even though I carried around in my head a belief that a deity once reanimated the corpse of his “son,” then brought that guy up to “heaven” to be a “ruler,” I never ever expected anything in the world to require supernatural explanation. So I didn’t need any barriers.
I have definitely revisited those years in my now ten years as an apostate, and asked myself all the hard questions about why I ever believed. I know this much: I thought god should be not just great but good. I had expectations. He failed them spectacularly.
Beverages are on me if they ever happen.