Imagination is more important than knowledge, because knowledge is limited, and imagination summarizes everything in the world, promotes progress and is the source of knowledge progress. -Einstein

Based on mental experiment and observation, imagination becomes the designer of natural science theory. -Tindal

Without some bold speculation, it is generally impossible to make progress in knowledge. -Einstein

Scientific research is particularly creative, especially relying on self-reliance. Of course, self-reliance does not mean shutting yourself off. -Li Siguang

We should remember that cocooned silkworms cannot see the world outside the cocoon shell. -Li Siguang

In scientific research, it is allowed to create any hypothesis. If a large number of independent facts are explained, it will rise to the level of well-founded theory. -Darwin

In natural science, creating methods and studying some important experimental conditions are often more valuable than discovering individual facts. -Pavlov

If a person wants to do something, he has to go his own way. To start a new road, the most important thing is whether you can ask questions yourself. Being able to ask questions correctly is the first step of innovation. Tsung Dao Lee

A talented person will never follow the way of thinking of ordinary people. Stendhal

Smart young people think that if they admit the truth that others have already admitted, they will lose their originality, which is the biggest mistake. -Goethe