1. Career is the vivid unity of ideas and practice

2. Birds with the same feathers will naturally gather together

3. Too much and too little exercise , the same damage to physical strength; eating too much and too little, the same damage to health; only moderation can produce, enhance, and maintain physical strength and health

4. In education, practice must precede theory, and Physical training must come before intellectual training

5. People who advance scientifically but lag behind morally are not moving forward, but retreating

6. Indulging one's own desires is the greatest the greatest evil; talking about other people's privacy is the greatest sin; not knowing one's own faults is the greatest illness

7. Living according to moral principles is a happy life.

8. Too much exercise and too little exercise will damage physical strength in the same way; eating too much and too little will damage health in the same way; only moderation can produce, enhance, and maintain physical strength and health.

9. The purpose of labor is to obtain leisure

10. Virtue can be divided into two types: one is the virtue of wisdom, and the other is the virtue of behavior. The former is obtained from learning, and the latter is obtained from practice

11. In misfortune, useful friends are more necessary; in luck, noble friends are more necessary. In misfortune, look for friends out of necessity; in luck, look for friends out of nobility.

12. Nothing God does that is better than any imaginable act of happiness is pure thinking, and the thing closest to this kind of happiness in human behavior may be the activity closest to thinking.

13. The ultimate value of life lies in the ability to wake up and think, not just in survival.

14. A person who indulges in pleasure without restraint will become a dissolute person; a person who avoids all happiness like a countryman will become a callous person

15. Good friends are like different bodies but one heart.