The classic sayings about keeping promises are as follows:

1. If you follow an upright and honest life, you will definitely end up with a clear conscience. ——Gorky

2. Honesty is a symbol of strength. It shows a person's high self-respect and inner sense of security and dignity. ——Eileen Kaser

3. Honesty is the most noble thing a person can maintain. ——Qiao Yu

4. An honest person must be trustworthy to himself, and his final support is sincerity. ——Emerson

5. Honesty and diligence should be your permanent companions. ——Franklin

6. The words of an honest man are as reliable as his collateral.

——Cervantes