1. The three conditions for studying are: more observation, more hardship and more research. -Garfield

2. The detail lies in observation, and success lies in accumulation. -Emerson

3. Nothing is difficult to observe, as long as you are willing to be careful. -Cao Shengyao

4. It is necessary to build confidence in love and observation in friendship. -Barnard

5. Be good at careful discovery in life. -Rodin

6. If you want to see the truth, pay close attention everywhere. -song fan

7. observe, observe, and then observe. -Pavlov

8. We should find an inseparable partner for our enthusiasm, and this partner is strict observation. -pasteur

9. If you don't judge or listen, you will misunderstand the book, and if you don't examine the unknown, you will go too far. -"Guanzi Zhouhe"

1. It should be observed carefully in order to understand; We should try to understand, in order to act. -romain rolland