1. If we admit defeat too readily, we may fail to realize that we are very close to being right.-karl popper

2. The same is true of "difficulty". Facing the cliff, we can't see a crack in a hundred years, but with an axe, we can advance inch by inch, and we have to advance inch by inch, accumulate and leap. Breakthrough follows.-Hua Luogeng (China)

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

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

5. When truth has shortcomings, these shortcomings will soon be eliminated, and the shortcomings of falsehood will always go with falsehood.-Diderot (France)

7. Anyone who is rash about truth in trivial matters, I'm also untrustworthy in major events.-Einstein (USA)

8. It's a man's bounden duty to explore the truth.-Copernicus (Poland)

9. I don't know what people in the world think of me. I think so: I seem to be playing in the sea, and sometimes I find a smooth stone, and sometimes I find a beautiful shell and I'm happy for it. The ocean of truth is still mysteriously unfolding before us.-Newton (UK)

1. The inspiration of science can never wait. If there is any accidental opportunity for scientific discovery, then this "accidental opportunity" can only be given to those who are literate, to those who are good at independent thinking and to those who have perseverance. Without giving it to lazy people.-Hua Luogeng (China)

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

12. We are enjoying the great benefits brought by other people's inventions, and we must also be willing to serve others with our own inventions.-Franklin (USA)