The famous sayings of physicists include the following:

Judge the beauty of heaven and earth and analyze the principles of all things. ——Zhuangzi

2. The laws of physics cannot be obtained by "thinking" alone, but should also be devoted to observation and experiment. ——Planck

3. Interaction is the first thing we encounter when we examine the entire moving matter from the perspective of modern natural science. Natural science confirms it. Interaction is the true ultimate cause of things. ——Engels

4. Nature and the laws of nature are hidden in the dark night; God said, let Newton go! Then everything is illuminated. ——Pope

5. Experiments can overturn theories, but theories can never overturn experiments. ——Ding Zhaozhong

6. Mechanics is the science of motion, and its task is to describe the motion that occurs in nature in a complete and simple way. ——Kirchhoff