The famous sayings of observation and discovery in grade three are as follows:

1. Careful observation of small things is the secret of success in career, art, science and life.

2. Since spying on Blake across the street is like looking in the mirror for Blue, instead of just spying on others, he finds that he is also observing himself.

3. What we call a matter of principle is a matter of observing and dealing with problems according to the general law of development of things.

4. Knowledge cannot be obtained from experience alone, but from the comparison between rational inventions and observed facts.

5. According to my observation, bad people, like all poisonous animals and plants, don't know that they are bad people and poisonous. I also found that bad people don't change.

6. The more complete the rule, the better the observation.

7. In the field of observation, opportunity only favors the prepared mind.

8. According to my personal observation, for most people in the world, life is meaningless and worthless.

9. Knowing that others have used effective methods, he can give children proper guidance.

1. Books don't tell people about their usefulness. The wisdom of using books is not in the book, but outside the book, and it depends on observation.

11. To measure a person's true personality, we only need to observe what he does when he thinks no one has found out.

12. Do it yourself, move your feet, and observe with your own eyes. This is the highest principle of our experimental work-Pavlov's famous saying

13. Observation is essential for children, just as sunlight, air and water are essential for plants. There, observation is the most important energy of wisdom.

14. Find out the way to discover the mysteries of nature through careful observation of small things.

15. Books pass through the window where the mind observes the world. A house without books is like a room without windows.