To really focus on yourself I think you need a lot of Dahnjon Power. Building energy in your dahnjon really helps you to keep centered in yourself so that you aren’t so affected by the whims and thoughts of others. Dahnjon Power!!!

From a translation of Ilchi Lee’s book The Power of the Brain

Without a goal, we have no choice but to endlessly chase after the thoughts of others. We envy those who know more or have more than we do, and we live out our lives completely forgetting our own brains. Such things happen to us often unless we are focused on ourselves.