Put yourself in his shoes and you'll understand his difficulty.
Tips
history
Zhu Xi's gloss on 《论语·卫灵公》: 己所不欲，勿施于人 ('do not do to others what you would not want done to yourself'). The Confucian ethic of empathy, reasoning from your own heart to another's.
culture
Functions as the Confucian equivalent of the Golden Rule. Central to traditional Chinese ethics and still widely invoked in moral education.
