1. The greatest victory is to defeat yourself. ——Gorky

2. The most spiritual person cannot see his own back. ——Africa

3. The most difficult thing is to know yourself. ——Greece

4. Self-respect, self-awareness, and self-control can lead to the lofty realm of life. ——Tennyson

5. Self-knowledge is the rarest knowledge. ——Spain

6. Complacency, arrogance and gullibility are the three hidden dangers in life. ——Balzac

7. You know where your shoes are tight. ——Spain

8. You know your own appetite. ——Soviet Union

9. Clean yourself by washing yourself in clear springs. ——Han Yu of the Tang Dynasty

10. Only when you have suffered deeply can you understand the pain of others, so it is difficult to reflect on yourself. ——Xi Juan

11. Only among the crowd can you know yourself. ——Germany

12. Just by being self-reflexive, nothing can be done in the world. ——Shen Juyun, an educator in the Qing Dynasty

13. It is never too late to correct mistakes when you know they are wrong. ——Shakespeare

14. The more incompetent a person is, the more he likes to find fault with others. ——Ireland

15. If you want to know yourself, it is best to ask others.