In your sleep, when your conscious mind becomes less active, your subconscious mind becomes more dynamic and expands out of the body.
Your conscious mind is your conscious-self or conscious-awareness. Your subconscious mind is your subconscious-self or subconscious-awareness.
So, when your conscious-self is less active, your subconscious-self expands itself out of the body to merge into the ether; therefore experiences flashes of images of places, events, and people.
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Now, in your waking state, when your conscious-self happens to be drawn by the subconscious mind into those places, events, and connections with people, your brain experiences a flashback as if what your subconscious-self saw in the dream state was actually a memory now activated called Deja vu.
If you can vividly dream your desire into sleep each night for ninety days straight, your subconscious-self will treat the dream of the desire as an actual event and the manifestation of the event in the physical world will feel like a Deja-vu.
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