When there’s a gap between who you are and who you intend to be, you are incongruent and unhappy. You’re torn, mentally exhausted, and regretful. You always slightly feel like a fraud to yourself, and probably to the people around you.
Why Keeping a Daily Journal Could Change Your Life
Benjamin Hardy

Man, you hit the nail on the head. When you feel like a fraud to yourself and others, you can only go so far until you want to throw in the towel.