From the second act of Don DeLillo's White Noise--an exchange between Murray Siskind and Jack Gladney, respectively.:
"There's a theory about déjà vu."
"I don't want to hear it."
"Why do we think these things happened before? Simple. They did happen before, in our minds, as visions of the future. Because these are precognitions, we can't fit the material into our system of consciousness as it is now structured. This is basically supernatural stuff. We're seeing into the future but haven't learned how to process the experience. So it stays hidden until the precognition comes true, until we come face to face with the event. Now we are free to remember it, to experience it as familiar material."