There most certainly are things we can't even imagine this side of Heaven :)
Now that we know about DNA, and that it is indeed delicate, I'm convinced that there must be some sort of pattern which is even smaller, and much more difficult to destroy.
The only other explanation I can think of is that what makes us who we are is perhaps stored or mirrored in another dimension or place. Sort of like what I read about in a book by Robert Sawyer. His books are definitely fascinating, and deal with real quantum mechanics via sci-fi books. He's not a believer, or at least wasn't, but his writing suggests he was / is searching.
!PIZZA !ALIVE !LOL !PIMP
RE: The Coherent Heart