1. He who knows others is wise, and he who knows himself is wise. He who conquers others is powerful, and he who conquers himself is strong. ——Lao Tzu

2. A strong-willed person can put the world in his hands and knead it like a lump of clay. ——Goethe

3. The most challenging challenge is to improve yourself. ——Michael F. Staley

4. Your spare time life should be meaningful and not deviant. ——Washington

5. Even if a person has reached the top, he must still strive for self-improvement. ——Russell Baker

6. The biggest challenge and breakthrough lies in employing people, and the biggest breakthrough in employing people lies in trusting people. ——Jack Ma

7. You live to make others live a better life. ——Lei Feng

8. Master books, don’t be mastered by books; read to live, don’t live to read. ——Bulwer

9. You must know that exaggerated praise of good things will also arouse people's disgust, contempt and jealousy. ——Bacon

10. Work is accomplished by hard work, but waste is achieved by playfulness; actions are accomplished by thinking, and destroyed by casualness. ——Han Yu

11. All savings ultimately boil down to saving time. ——Marx

12. Will and destiny often run in opposite directions, and determination will be overthrown in the end. ——Shakespeare

13. Learning is labor, labor full of ideas. ——Ushensky