The diary in dreams is a much-needed authority figure that listens and cares. This role was either not filled or occupied by parents, teachers, classmates or spouses and they were unavailable to the person in real life. Dreams provide an opportunity for the writer to express themselves on desires, feelings, goals and regrets.
The interpretation of diary in dreams is dependent on the contents of the diary itself. If it’s related to warm memories and setting simple goals then the meaning suggest that this person experienced comfort during childhood or ease of achieving their big objectives with small steps.
Also, dreaming about looking at your own diary is a way to be your best listener and find out what you feel like you may be living without acknowledging but need to remind yourself about. The meaning in this self-reflection exercise is that you are able to see things in your life that give satisfaction while also being present as well as acknowledging the regrets or guilt feelings stemming from frustrations with yourself or others.