just to add an example to support your comment

oen of my friends is this happy figure that everyone likes in her company. In any kind of conflicts, all parties believe she is on their side. one would assuem taht she is truly happy. But she keeps reading books like teaching peopel how to maintain positive attitude to be happy at work and reads a lot of them. is she is really so happy, why does she need to read those books? Isn't it wierd?