For example, the major source of anger is frustration and dissatisfaction. At the moment when an emotion like anger is full-blown, even if we try to use our experience and our knowledge to reduce it, we will find it is very difficult to stop. At that point it is like a flood. During monsoon season, it is too late to stop the flooding. We need to start early in the spring and investigate what is causing the flooding and try to build flood walls to prevent disaster.