People who are stubborn about the old theory of light would be better off starting from its own principles and proposing experimental explanations. And, if he fails in this effort, he should acknowledge these facts. ——Thomas Young

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

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

The development of our ideas often comes from curiosity in a sense. ——Einstein

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

Science walks on two legs, one is theory and the other is experiment. Sometimes one leg goes in front, sometimes the other leg goes in front. Only by using two legs can you move forward. ——Millikan

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

Experiment can overturn theory, but theory can never overturn experiment. ——Ding Zhaozhong

The four directions up and down are called the universe, and the communication between ancient and modern times is called the universe. ——Xi Jiao

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

Electricity has changed the way we live and has given rise to a huge field of engineering applications. ——Emilio Segre

Without today’s basic science, there would be no tomorrow’s technological applications. ——Lee Tsung-dao

(Newton's) "Principia" will become an immortal monument of profound wisdom. It shows us the greatest law of the universe, which is higher than all other products of human thought (at that time) The masterpiece above, the discovery of this simple and universal law, has given glory to human wisdom by the vastness and diversity of objects it encompasses. ——Laplace

The task of physics is to discover universal laws of nature. Because one of the simplest forms of such a law manifests itself in the invariance of a certain physical quantity,

The greatest revolution in the axiomatic basis of physics since Newton laid the foundations of theoretical physics was Caused by the work of Faraday and Maxwell on electromagnetic phenomena. ——Einstein

So the search for conserved quantities is not only reasonable, but also an extremely important research direction. ——Laue

Science is the art of answering questions. The frontier of science is a new frontier between the comprehensible and the incomprehensible, between the known and the unknown. Scientists working in this field do their best to push the boundaries of what can be solved in unsolvable directions and do their best to reveal unknown areas. ——Peter Meneva