There are two purposes to a dream log, also called a “dream journal”. The first is to recognize themes. You see our dreams help us resolve issues that are bothering us. We may not even be aware of these issues in our conscious mind. Your dreams are mostly expressions of your hopes, desires and fears.
Now, the second use for a dream log is to learn lucid dreaming. When we recognize the patterns of our dreams we can then begin to recognize that we are in the dream while we are dreaming. You can train yourself to recognize that when you see water you are dreaming. Then once aware in the dream you can gain some insight into its meaning or even control the dream. It takes practice. The simple act of writing down the dream helps in lucid dreaming.
๑ Samsaran ๑