2. The laws of physics cannot be obtained by "thinking" alone, but we should also devote ourselves to observation and experiment. -Planck
3. Interaction is the first thing we encounter when we look at the whole moving matter from the point of view of modern natural science. Natural science has proved that ... interaction is the real ultimate cause of things. -Engels
4. Nature and its laws are hidden in the dark; God said, let Newton go! So everything was illuminated. —— Pope
5. Experiment can overturn theory, but theory can never overturn experiment. -Ding Zhaozhong
6. Mechanics is a science about movement, and its task is to describe the movement in nature in a complete and simple way. -Kirchhoff
7. The Principle (Newton's) will become an immortal monument of profound wisdom, which shows us the greatest law of the universe and is a masterpiece higher than all other products of human thought at that time. The discovery of this simple and universal law, with its huge and diverse objects, gives glory to human wisdom. -Laplace
8. The task of physics is to discover universal laws of nature. Because one of the simplest forms of this law is the invariance of a certain physical quantity, it is not only reasonable but also an extremely important research direction to seek the conserved quantity. -Laue
9. Science is an art that can be answered. The frontier of science is a brand-new territory between solvable and difficult, known and unknown. Scientists working in this field try their best to push the solvable boundary towards the difficult direction and try their best to reveal the unknown field. -Peter Meneva
1. Electricity has changed our way of life and produced a huge engineering application field. -Emilio Seguri
11. The most obvious phenomenon in the experiment of electricity and magnetism is the interaction between objects at a considerable distance from each other. Therefore, the first step to turn these phenomena into science is to determine the magnitude and direction of the force between objects. -Maxwell
12. "Mr Faraday, what's the use of it?"
"ah, sir, maybe it won't be long before you can collect taxes on it."
—— Dialogue between British Chancellor of the Exchequer Glass and Faraday
13. The discovery that high-voltage current is transmitted to a long distance that has never been dreamed of by ordinary wires with little energy loss and used at that end makes the industry almost completely get rid of all the boundaries stipulated by local conditions, and makes it possible to use water power in a very remote place. If it is only beneficial to cities at first, it will eventually become the most powerful lever to eliminate the opposition between urban and rural areas. -Engels
14. Without today's basic science, there will be no tomorrow's application of science and technology. -Li Zhengdao
15. Science is a method, which teaches people how some things are understood, what they don't know, and how much they know now ...-Fei Enman
16. Water waves leave the place where they are produced, but the water there doesn't leave, just like the wheat waves raised by the wind in the fields. We saw that the wheat waves rolled towards the fields, but the wheat remained in its original place. -Leonardo da Vinci
17. People who stick to the old theory of light had better start from its own principles and put forward experimental explanations. Moreover, if his efforts fail, he should admit these facts. -Thomas Yang
18. Since Newton laid the foundation of theoretical physics, the greatest change in the axiomatic foundation of physics was caused by Faraday and Maxwell's work in electromagnetic phenomena. -Einstein
19. Going up and down everywhere, going back and forth between ancient and modern times. -Shi Jiao
2. Imagination is far more important than knowledge, knowledge is limited, and imagination can protect the whole world. -Einstein
21. The history of science is not only a series of facts, rules and subsequent mathematical descriptions, but also a history of concepts. When we enter another new field, we often need new concepts. -Planck
22. Walking on two legs in scientific examination, one is theory and the other is experiment. Sometimes one leg walks in front, and sometimes the other leg walks in front. Only by using two legs can we move forward. -Millikan
23. The interaction between gravity, electricity and magnetism can be clearly shown in a far place, so it can be observed with the naked eye; But there may be other interactions, and their distance is so small that it is impossible to observe. -Newton
24. The development of our thoughts often comes from curiosity in a sense. -Einstein
25. Gunpowder, compass and printing-these are the three great inventions that predicted the arrival of bourgeois society ... The compass opened the world market and established a colony ...-Marx