诲人不倦毁人不倦
[huì rén bù juàn huĭ rén bù juàn]
It can be translated as “never tiring of teaching people or ruining people” which is somewhat ironic or sarcastic, referring either to endless dedication in educating or the persistence seen negatively. Depending on context, it could imply patience and perseverance or critique against excessive intervention or over-control in one’s teaching method.