Having courage is essential to achieve goals, be successful, and stand out from the crowd. It requires courage to step out of your comfort zone, face fears, and fight back against obstacles. The true enemy that can destroy you is within yourself - the self-doubt, negativity, and comfort zone that hinder your growth and potential. To combat this internal enemy, one must continuously work on personal development and strive for improvement, resisting the allure of staying comfortable and stagnant.