1) Once a word is spoken, it cannot be followed. ——Chinese proverb

Explanation: I am very trustworthy, and I must keep my word when I say it.

2) If a person has no faith, he doesn’t know what he can do? The phrase comes from "The Analects of Confucius and Weizheng"

Explanation: If a person has no credibility, how can he succeed?

3) If you are sincere, the gold and stone will be opened. Quotation from: "Miscellaneous Notes of Xijing, Volume 5"

Explanation: Wherever sincerity touches, even hard metals and stones will be split.