Mortals standing between heaven and earth must be "sincere" when encountering problems. Then later generations will begin to believe that they are human beings, and they will have the value of being human. How can those who practice deceit establish a reputation and build a career? ——Lu Pengbo

If you don’t have faith in your words, you don’t know what’s right.——Confucius

You can’t always be faithful in your words, and you can’t always be honest in your actions. You should only give in to what is beneficial, and if so, then It can be said that he is a villain - Xunzi

The king has faith, and all the countries will be safe; the princes have faith, and the territory is peaceful; the gentleman has faith, and he has established himself. If the king does not believe in serving his ministers, and the ministers do not trust in serving the king; if the father does not trust in teaching his son, and the son does not trust in serving his father; if the husband does not trust in meeting his wife, and the woman does not trust in the way in which she takes care of her husband, then the king and his ministers will trust the court. Father and son are suspicious of each other. The couple is suspicious of each other. ——Fu Xuan of the Western Jin Dynasty, "Fu Zi·Yixin"

Faith is like the soil of the Five Elements, with no position or fame, and water, metal, and wood are all waiting for those who live there. ——Zhu Xi

Those who do not believe in their words will have no results in their actions.

——Mozi