It is when we take things personally, and if you still have an ego that needs taming, then engaging in this exercise could help (watching your life as if it is one big movie). Again, the movies don’t affect you afterwards is because they are all a fiction, because there is no central observer that is taking everything into their personal sense of self. They are departed from your personal life. While you are in the movie, you experience all those emotions of fear, joy, pleasure, love, hurt, suffering, pain, and can identify with the actors portrayed.
But what happens when you leave the theater? You recognize that all of it was just like a dream you were having last night. They were not “reality”. The same thing can be applied to your real life. What happens is also a fiction and a dream that you are creating into a reality. Life is really just that. It is a fiction that you are creating, and events can be let go in the same way that you do when you leave a movie theater. Try this exercise for the next day.
No two days are the same. In fact, every day is different. And you may experience all the emotions that you experienced at the movies in one 24 hour period. The rushes, envy, jealousy, tragedy, and so forth. Every day brings with it a new movie. And except for physical pain (like if you were in an accident that bruised your body), the events do not carry forward to the next day. It is you that chooses to replay yesterday’s events again.
Do you enjoy rewatching the same movie over and over again? Of course not. This is because you have experienced the thrills, both good and pain, already. Just drop the previous day in the same way. Know that you have a mind that is programmed by society to be constantly in the “wanting” phase. And it is up to you to make a change. If you choose to recycle the old painful memories, know that that is your choice to do so.