This is a good question. I’m not sure that it is. I think it is that people think of themselves as being unique and special. This means that any event you are going through is a reflection of who you are.
This is usually the case when you are in a good mood. An event that is a reflection of your true nature is a good mood and an event that is not a reflection of your true nature is not a good mood and that is the definition of a bad mood.
It is true that you are unique and special. However, an event that is a reflection of who you are is also a reflection of who you are. In other words, the more that you are aware of your true nature, the less you are able to be aware of the events that reflect that. If you are aware of your true nature, you can choose to not be aware of the negative events that reflect that.