If a person keeps repeating the same thing over and over again, will they at some points, feel like a part of it? Even though, in fact they never were.
E.g., A historian telling about the “Black Death”, about how it started, spread and ended. Not once, not twice, but whenever he/she has a speech. To make it realistic, he/she always imagine about it, how serious it is back then. Then suddenly, at some points, it started to feel so real.