1. The greatest disaster in life is not the trauma of the past, but giving up the future. ——Helen Keller, "The Man Who Reshapes Life"

2. For those who are above fate, confidence is the master of fate. ——Helen Keller, "The Man Who Reshapes Life"

3. No matter how bad the fate is, people should always do something. Where there is life, there is hope. ——Hawking, "My Brief History"

4. If you are very talented, diligence will make your talent more perfect; if your talent is mediocre, diligence will make up for your flaws. ——Reynolds, "Little Samuel"

5. Never try to cover up the flaws in your knowledge, even if you use the boldest speculations and assumptions to cover up, this is unacceptable. No matter how dazzling the color of this soap bubble is to you, the soap bubble is bound to burst, and you will gain nothing except shame. ——Pavlov's "A Letter to the Youth"

6. Since there are black spots on the sun, things in the world are even less likely to be without flaws. ——Chernyshevsky "What to Do?" 》

7. A foot of wood must have its flaws, and an inch of jade must have flaws. ——Lu Buwei's "Lu Shi Chun Qiu. Li Shi Lan. Li Shi"

Vernacular translation: A tree one foot high must have knots, and a jade one inch in size must have jade spots.