Einstein: 1. To learn knowledge, you must be good at thinking, thinking, and thinking again. I relied on this learning method to become a scientist.

2. Raising a question is often more important than solving a problem, because solving a problem may only be a mathematical or experimental skill. Raising new questions, new possibilities, and looking at old problems from a new perspective all require creative imagination and mark real progress in science.

3. Science is never and will never be a finished book. Every major achievement brings new problems. With every development new and serious difficulties arise over time.

4. The ideal that illuminates my path and constantly gives me new courage to face life happily is goodness, beauty and truth. Life would seem to me to be empty without the cordial feeling between like-minded people, without the absorption of the objective world, that object which can never be reached in the realm of artistic and scientific work. The vulgar objects to which men strive—possessions, vanity, luxury—have always seemed to me despicable.

5. In science, every road should be explored. Discovering a road that does not work is a great contribution to science. ... Let me do the thankless work of proving that "this road is unavailable"!

Hua Luogeng: 1. There is no smooth road in science, and there are countless rocks and shoals in the long river of truth. Only herb collectors who are not afraid of climbing, and tide-drifters who are not afraid of huge waves, can climb to the top to collect fairy grass and go deep into the water to find Li pearls.

2. Genius is not trustworthy, intelligence is unreliable, and it is unimaginable to pick up great scientific inventions by chance.

3. It is best for us to regard our own life as the continuation of the lives of our predecessors, a part of the same life today, and the beginning of the lives of future generations. If this continues, science will become more brilliant day by day, and society will become more beautiful day by day.

Galileo: 1. The only purpose of science is to alleviate the suffering of human existence, and scientists should consider the majority of people.

2. Scientific truth should not be found in the dusty books of ancient saints, but should be found in experiments and theories based on experiments. True philosophy is written in the greatest book that is always open before our eyes. This book is the universe, nature itself, and one must read it.

3. In the long march of seeking truth, only by learning, constantly learning, diligently learning, and creative learning can we cross mountains and ridges.