They’re playing back movies of things that happened to them yesterday. They’re living in fantasy worlds of what’s going to happen tomorrow. They’re just pulled out of base reality. That can be good when you do long-range planning. It can be good when you solve problems. It’s good for us as survival-and-replication machines. I think it’s actually very bad for your happiness. To me, the mind should be a servant and a tool, not a master. My monkey mind should not control and drive me 24/7.