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)