1. The most important thing in interpersonal relationships is sincerity, and it must come from the sincerity of the heart. Sincerity is an invincible sword in society, and you should carry it wherever you go. Author: Sanmao

2. Be honest with others, and others will not bully you; be honest with others, and everything will be accomplished. Author: Feng Yuxiang

3. Frankness is the product of honesty and bravery. Author: Mark Twain

4. If you make a mistake, you can get back on your feet immediately; if you break a promise, you may never recover. Author: Franklin

5. It is more important for a person to strictly keep his promise than to guard his property. Author: Molière