Perhaps, like the rest of the body, the brain is more an interface between the physical world and the "true self" (call it "soul" if you prefer). That includes

Perhaps, like the rest of the body, the brain is more an interface between the physical world and the "true self" (call it "soul" if you prefer). That includes relationships with others' interfaces. In this view, changing the brain merely changes how we perceive the world, our behavior in it and, thus, how we are perceived by and relate to others. Interestingly, it can also change our sense of our own self in relation to the world. When you consider disorders like depersonalization and derealization, they seem to be exactly a defect in this sensory system. The nature of who you are hasn't changed, but your sense of who you are has.