When speaking of the health benefits of journaling, Maud Purcell notes that journaling dates back to the 10th century Japan and that successful people throughout history have been known to keep them. 

Health Benefits

There is increasing evidence that supports journaling as having a positive impact on physical well-being. James Pennebaker, the University of Texas at Austin psychologist, states regular journaling can even strengthen immune cells. Pennebaker believes journaling to be a stress reliever. Therefore, having the ability to reduce the impact of these stressors on your physical health. Let's sum up some possible benefits:

• Clarity of thought and feelings.

• Increased positivity and self-awareness

• Reduction of anger, sadness, and other painful emotions.

• Enhanced Problem-solving ability

• Resolutions to disagreements with others.

Source: Purcell, M. (2018). The Health Benefits of Journaling. Psych Central.