-The Analects of Confucius. Jishi "
The meaning of a gentleman is benevolence, courtesy: the benevolent loves others, and the courtesy respects others. Those who love others will always love others, and those who respect others will always respect others.
-Mencius: "Mencius Li Lou"
Courtesy is reciprocated. It is impolite to leave without coming. It is impolite to come instead of going.
-The Book of Rites. On Quli