Dream about reading a diary is a harbinger for the birth of a new idea, direction, project or goal. You are on a quick downward slide. You need a break from the monotony. This is a hint for the hardships, risks or failures you are faced with in your endeavors. You are desperately rejecting an aspect of yourself.
Reading a diary dream is a metaphor for your lack of self confidence and self-esteem. Opposing views/aspects are coming together. You need to apply what you learned and incorporate it into your daily life. The dream points to your vulnerability and your fear of intimacy. You are being over controlling.
If you dreamt about reading a diary:
You may have so much fun today that you forget to check on the happiness of the people around you. You should feel quite a surge of strength because of the energy of today, but realize that other people may have a hard time keeping up with your fantastic pace. Stop and take a break in order to allow other people to catch up.