Lesson 1: Do not sympathize with anyone.

Lesson 2: Do not trust anyone.
Lesson 3: Try not to help anyone.
Lesson 6: Do not think too highly of everyone.
Lesson 4: Do what you should do, do not judge anyone.
Lesson 5: Do not share your inner thoughts with colleagues at work.
Lesson 7: Do not reveal family matters; no one will sympathize with you.
Lesson 8: Do not care about others' opinions and evaluations; focus on being yourself.
Lesson 9: People change; do not take all relationships too seriously.
Lesson 10: There are no truly good people in the world; being true to yourself is most important.
Lesson 11: When you enter society, no one will tolerate you because you're young; they will bully you even more.
Lesson 12: Under interests, see character; under power and beauty, see virtue.
Lesson 13: Rely on yourself; relying on others or mountains will cause them to fall.
Lesson 14: Sometimes you need to learn to pretend to be naive, see through but not expose.
Lesson 15: Sometimes you need to learn how to be a person and avoid offending others easily.
Lesson 16: Falling into hardship once will reveal whether the people around you are real or fake.
Lesson 17: You can't be too honest; even the best friends may betray you.
Lesson 18: Do not help those who have no conscience.
Lesson 19: Let go of your obsession, and life will become more at ease.
Lesson 20: Anyone who cannot tolerate others' success, brilliance, or only cares about victory and defeat.
Lesson 21: Without social skills, there is no easy path.
Lesson 22: Look far ahead; after crossing the mountains, your horizons will expand.
Lesson 23: Emotions are never cheap; kindness always has a bottom line.