Déjà vu is in my experience, the remembering of something not from memory as if another life. An example; a friend of mine was traveling to the coast, and to a part and on a road he had [allegedly] not gone before. Upon reaching near the top of a steep hill he said to the others in the car, ‘there is a small castle just over the hill’, and a few seconds later one was revealed in the valley below. Easily explained away of course, but I wont be doing that here because I am going to take it as real such to explore it meaning. If I say it isn’t true I don’t think I’d be doing it justice.
If true then…
We could say that in another life he had travelled to said region or lived there, and thus the experience [I think that it is an experience and not merely information is important] was somehow remembered. In hypnotic regression people remember past lives and I doubt everyone has been a king or someone famous, but mostly people seem to get visions of well known characters [though often not too]. at a guess if we looked into all such cases, we would probably find multiple instances of the same people, kings and whathaveyou, being ‘remembered’ as if to be a past life. So I’ll skip straight past that one too; what we are left with in short, is a zone of memories and lives, something akin to the akashik book of records [history] in hinduism.
Thing is, to know what anything means it must be experienced and that experience must be personal. Otherwise we’d just be talking about information, and yet no amount of info will tell us what and who we are, nor what an experience of said knowledge is.
Ergo, to read from ‘the book’, one has to be taken to or given the experience, or otherwise you cannot know what any of that means. It may or may not be an illusion e.g. if it is not your memory, but to read from the book you have to go into the experience such to know what it means.