1. How can a person know himself? Not by thinking, but by practice.

2. I have a shallow understanding of what I got on paper, and I never know that I should do it.

3. Whether people's thinking has objective truth is not a theoretical problem, but a practical one.

4. Theories that can't stand the test of practice are useless and even harmful.

5. A journey of a thousand miles begins with a single step.

6, don't uncover the pot until it is cooked.

7. The more you use your hands and feet, the more flexible you become.