The famous aphorisms about "faith" are as follows:

1. Be true to your words and be resolute in your deeds. This sentence comes from "The Analects" and means to be trustworthy when speaking and decisive when doing things. It tells people that their words and deeds must be consistent, and they must be decisive in doing things. They must not hesitate or break their promises. This sentence emphasizes the importance of keeping one's word. Only by doing what you say can you gain the trust and respect of others.

2. Believers have the heart of the people. This sentence comes from "Zuo Zhuan", which means that integrity is a person's original intention. It emphasizes that integrity is a person's inherent quality. Only by being sincere and trustworthy can we win the trust and respect of others. This sentence tells us that integrity is the foundation of a person's life and an indispensable quality.

3. Trust to establish your resolve, trust to guard your body, trust to conduct yourself in the world, and trust to treat others. This sentence comes from "The Complete Works of Zeng Wenzhenggong", which means that integrity can establish ambitions, maintain one's own character, deal with worldly affairs, and treat others. It tells people that integrity is a quality that a person must have in all aspects. Whether it is determination, integrity, conduct, or dealing with others, integrity must be adhered to. Only in this way can you win the trust and respect of others.

4. Those who believe should not be deceived. This sentence comes from "Shuo Yuan", which means that integrity means not deceiving others. It emphasizes the most basic meaning of integrity, which is not to lie or deceive others. Only by being honest and trustworthy can we build trusting relationships and maintain good interpersonal relationships.

Examples of letters:

1. I believe what he said is true.

2. He is a person who keeps his word and keeps his word.

3. I believe in his ability and he will be able to complete this task.

4. His reputation is very high in the business world, and everyone trusts him.

5. I believe that the quality of this brand’s products is guaranteed.

6. He is trustworthy and trustworthy.

7. This project has credibility and we can invest with confidence.

8. His creed is to be honest and trustworthy, and to be consistent in his words and deeds.

9. His credit is very good and you can trust him.

10. This source of information is credible and we can use it as a basis.

11. We believe he will fulfill his promise.

12. This company’s reputation is very poor in the industry and we cannot trust them.

13. His creed is "what you preach must be done, and what you do must be resounding."

14. His behavior has always been trustworthy, and we all trust him.

15. This plan lacks credibility and we need to reconsider it.