To show due respect toward others is to respect yourself. Treat others the way you wish to be treated. If you hurt others, you will eventually hurt yourself.
给别人面子,就是给自己面子;
你希望别人怎样对你,你就要怎样对别人;
伤害别人,最终伤害的是自己。
– Master Jun Hong Lu, Words of Wisdom Volume 3