I have never read the book Chapters of Life, but what you are talking about reminds me of this documentary I saw (on Netflix I believe), where a quantum physicist was talking about the possible existense of multi dimensions, granted these people are scientists so you have to keep in mind they don’t believe perse that magick exists so they are only theorizing from experiences and experiments. I forgot his name but he mentioned that he believes there are multi dimensions, not sure how many but he said it could be anywhere from 3 or 4 to possibly 6 or 8 and that, in each dimension, a different version of ourselves can co-exist.
He said, if your name is John and you exist on earth, a single man with no kids working as a security guard and you find that you long to have children and a wife, you yearn for them day in and out, it may be because in another dimension your name is Jarred and you have a wife and 3 kids. What you have in one dimension, you lack in another which may explain why some of us have urges to acquire certain things to the point that it becomes an obsession. This is similar to the past lives theory. That in a past life, if you have always had something and you are reincarnated but this time, you lack that something, you will crave that something because you were so used to having it in a past life.
Well the same thing could be said about having 5 different versions of ourselves co-existing in 5 different dimensions. Our conscious mind is unaware of that co-existance but what if our subconscious mind IS aware? Maybe, in relation the OP’s post, that feeling of dejavu we get, like feeling like you’ve been to a place you just visited for the first time, that feeling is subconsciously being fed to us from one of our other multi-dimensional selves? Maybe one of our “selves” has in deed been there before, or even lived there? The theory said, the multi dimensions could be in other realms or they could all exist right here on earth but we just can’t see them. Sort of like the theory that spirits are everywhere walking the earth, even walking thru us, but we cannot physically see them. Maybe we get a feeling of dejavu when we visit a place or experience a situation similar to one that one of our other selves has experienced? Or maybe we have actually crossed paths with that other self when this happens?
It’s possible. There is an old saying that, everyone has a twin out there. Maybe that’s not an old wives tale. It could be based on our ancestors previous experiences.