Many people suffer from attachment to their ego - the ego of the small self.
Most of these people cannot get beyond the ego, hence they are unable to understand the true nature of existence. Ego perception is very limited. It cannot see beyond the nine inches by nine inches of our skull. When we help others from the ego point of view, when we love other people from the ego point of view, when we relate to people from the ego point of view, then there is bound to be tension, there is bound to be stress, there is bound to be nervousness and insecurity. Doing anything from the ego point of view is very limiting.