We generally bring our beliefs with us when we dream, and when we try to understand our dreams. The logic we employ when attempting to interpret our dreams may arise from a belief system regarding the dream world such as one emanating from the beliefs of Sigmund Freud or Carl Jung. Or perhaps a belief that dreams are unimportant will be reflected in a lack of dreams.
Some people use dream books as road maps to the dream world.
Some of these maps are better than others. There are many destinations in the land of dreams. The map you use has a lot to do with where you end up. By writing down your dreams, you begin to create your own map of the dream world. Some people use only one map for reality.