Analects 15.23-24 · WEI LING KUNG
Tsze-kung asked, saying, 'Is there one word which may serve as a rule of practice for all one's life?' The Master said, 'Is not RECIPROCITY such a word? What you do not want done to yourself, do not do to others.' The Master said, 'In my dealings with men, whose evil do I blame, whose goodness do I praise, beyond what is proper? If I do sometimes exceed in praise, there must be ground for it in my examination of the individual. 'This people supplied the ground why the three dynasties pursued the path of straightforwardness.'