Memory is a way to recall information to be used or to not be used. It's powerful for what you use it for, and how much you add to it. Sometimes bad memories can enforce us, persuade us to take a stand for something. For instance a person with a history of selling drugs can look back on their past and be reminded of that. And since they were reminded, they can support prevention programs/etc...so that someone doesn't repeat the same mistakes they did. Bad memories can serve for a good cause depending on if you act right on them or not.

Memory often are wrong. It adorns everything. Live for the day. Do not pay much attention to your memory))