If you really want to teach, teach them after shedding yourself of the ego to teach, and then others will not be burdened by learning from you. For if you teach others only with your ego's desire to teach, you will be annoyed when others do not accept your lessons. Where there is annoyance, there cannot be the work of Buddha. At such a time, you should realize your limitation as a teacher and surrender that annoyance.
— Jae Woong Kim, Polishing the Diamond, Enlightening the Mind by Jae Woong Kim, Yoon Sang Han, translator