Here’s a fascinating snippet from neurologist VS Ramachandran, talking about a split-brain patient. The patient’s right brain believed in God, but the more rational left brain was atheist.
Ramachandran points to the obvious theological problem of what, in the Christian view, happens to such a person after they die; does the right brain go to heaven and the left to hell?
But more interesting to me with split brain studies is how they reveal the fictional nature of the self. Split brain patients clearly cannot have one self, since the two parts of the brain function independently and cannot communicate directly with each other, and yet people with split brains have a sense of a unitary self. I
n my book, I show how the left brain of split-brain patients tries to explain away (and thus take the credit for) actions that the right brain has initiated. It seems to me that it’s this “plagiarism” that constitutes the sense of a unitary self. The left brain is, I believe, unaware that it’s a plagiarist — it’s simply deluded. In part, I suspect that stream-entry, which involves the loss of the belief in a unitary self, involves the left brain finally “getting” that it doesn’t run the whole show that we call “the self.” It comes to realize that it’s simply observing, labeling (and often taking the credit for) actions initiated outside of conscious awareness.