**I learned that living in the present, not the past, is a very important tool for living a mostly happy life.**
I live in the present, and try to plan for the future, but now and then I don’t mind re-living great times of the past, such as meeting my wife one night (very impressed), and the first date the next night (permanently smitten).
Reliving pleasant memories can be a boost. Reliving traumatic experiences without resolving them only keeps you in a dark place.
Unfortunately for my sister, she relives her past traumas frequently, and yes, she is a depressed person. It’s hard to get her to snap out of it. She is the one who ultimately makes that choice. I cannot fix it for her.