Journals are great. More people should keep some sort of record. They give context to your emotions and allow you to learn from your past. To note patterns and remember motivations.
I have been blessed with a good memory and I still find them useful.
And without such tools for introspection and self-reflection I wonder if many of us would be doomed to the most narrow of tunnel visions, only able to gaze forward at the future, only able feel only feel the present as the walls press in around us.