Deja vu is the sensation that one has already experienced events that are happening in the present. There have been times in my life when I have experienced that feeling very powerfully. For example, I have had conversations in which I suddenly felt seized with conviction that I had already had the discussion before and thus could predict with complete accuracy what the other person was about to say.
Some think that it is just a trick of the mind, misfiring neurons or something like that, but I don’t buy that. How can one explain a moment in which one briefly becomes capable of predicting the course of the next 30 seconds or so?
I have come up with my own explanation of this phenomenon. Maybe time is not linear, even though we experience it that way. Maybe everything has happened, is happening, and will happen all at the same time. All of time already exists, but we are only capable of perceiving it as past, present, and future. If that is the case, it seems possible that the me now could potentially access what the me in the future knows. Somehow, this notion links up with the concept of eternity.
What I can’t explain is why it never happens with anything big. The times I have had deja vu, it has related to knowing ahead of time things like people’s odd movements (a stumble, twist, or gesture), or a water fountain spraying up in someone’s face, or the next few turns of a conversation.