Who is your greatest enemy? Have you ever considered it may be yourself? Do you procrastinate until the very last second? Do you secretly fear success? Do you quit when things get tough or because you do not see instant success? These are all self-sabotaging behaviors and they are a sign that you may be your own enemy.
Journaling can be a very helpful with many mental health issues especially low self-esteem and rampant self-doubt. Have you ever been extremely anxious, angry, sad, frustrated, and once you spoke to someone, or wrote it down, you felt better? Just being able to express yourself is very important for happiness. Journaling is a fantastic way to express yourself.