John Updike takes a stab at The Big Question:
It’s beyond our intellectual limits as a species. Put yourself into the position of a dog. A dog is responsive, shows intuition, looks at us with eyes behind which there is intelligence of a sort, and yet a dog must not understand most of the things it sees people doing. It must have no idea how they invented, say, the internal-combustion engine. So maybe what we need to do is imagine that we’re dogs and that there are realms that go beyond our understanding. I’m not sure I buy that view, but it is a way of saying that the mystery of being is a permanent mystery, at least given the present state of the human brain.
I think the next big evolutionary leap for humans will some form of AGI (Artificial General Intelligence). When the AGI is as intelligent as we (or it) needs or wants to be, I’m going to ask it to take a good, long look at Reality and once it has a good grasp, to explain/show it to me in a way I can understand. And it will look exactly like the Reality 1.0 I’m currently running. Until, of course, we reach the point where the AGI can modify my wetware sufficiently for me to glimpse the Source Code in all its magnificence.