1. If we admit failure too readily, we may not realize that we are very close to being right. ---Karl Popper

2. The same is true for "difficulty". Facing a cliff, you can't see a crack in a hundred years, but with an axe, you can get in inch by inch. Step by step, keep accumulating, leaps will come, and breakthroughs will follow. ---Hua Luogeng (China)

3. I really want to invent a trait or machine with such terrible large-scale destructive power that war will become impossible forever. ---Nobel (Sweden)

4. Only by obeying nature can we control nature. --- Bacon (UK)

5. The ocean of truth lets all the undiscovered things lie before my eyes for me to explore. --- Newton (UK)

6. The benefits of error are temporary, while the benefits of truth are permanent; when truth has disadvantages, these disadvantages will be eliminated soon, while the disadvantages of fallacy will Always with the fallacy. --- Diderot (France)

7. Anyone who takes the truth lightly in small matters is also untrustworthy in big matters. ---Einstein (USA)

8. Man's bounden duty is to have the courage to explore the truth. ---Copernicus (Poland)

9. I don’t know what people in the world think of me. But I think of it this way: I seem to be a child playing on the sea, sometimes finding a smooth stone, sometimes finding a beautiful shell and being happy about it. Despite this, the ocean of truth mysteriously opens before us. ---Newton (UK)

10. Scientific inspiration can never come by waiting. If there is any accidental opportunity in scientific discovery, then this kind of "accidental opportunity" can only be given to those who are well-educated, to those who are good at independent thinking, and to those who have a perseverance spirit. Not for lazy people. ---Hua Luogeng (China)

11. A scientist should consider the comments of later generations, not the insults or praises at the time. ---Pasteur (France)

12. We are enjoying the huge benefits that other people's inventions have brought to us, and we must also be willing to use our own inventions to serve others. ---Franklin (USA)

13. My philosophy of life is work. I want to reveal the mysteries of nature and benefit mankind. ---Edison (USA)

14. I have never made an accidental invention in my life. All my inventions are the result of careful consideration and rigorous testing. ---Edison (USA)

15. Developing the general ability to think independently and judge independently should always be given top priority, rather than the acquisition of professional knowledge. If a person masters the basic theories of his subject and learns to think and work independently, he will surely find his own path and will be better off than someone whose training consists mainly of acquiring detailed knowledge. Will be better able to adapt to progress and change. ---Einstein (USA)

16. All reasoning must be derived from observation and experiment. ---Galileo (Italy)

17. Learn to do the rough work in science. Study facts, compare facts, and accumulate facts. ---Pavlov (Russia)

18. My most important discoveries were inspired by failure. ---David (UK)

19. Thank God for not making me a dexterous craftsman. Some of my most important discoveries were inspired by failure. ---David (UK)

20. I have been working hard for more than fifty years and am committed to the development of science. One word can describe the characteristics of my most difficult work, and that word is "failure."

---Thomson