1. Without some bold and unbridled guesses, it is generally impossible to make progress in knowledge.

2. Every good thing is difficult at the beginning.

3. If your only tool is a hammer, you may think that all problems are nails.

4. The steps are not designed for resting, they are just for people to step on one foot to make the other foot higher.

5. A poor craftsman complains about his tools.

6. Never give up on yourself.

7. Just walk, as long as you walk, strength will naturally occur.

8. Having imagination but no discernment is the most terrible thing in the world.

9. People should live independently and learn useful skills.

10. A person who loves practice but does not pay attention to science is like a sailor entering a ship without a rudder or compass. He is never sure where he is going.

11. One of the biggest dangers of doing things too fast is one of the biggest dangers.

12. Asking the right questions often equals solving most of the problems.

13. Assumptions always precede knowledge.

14. Before you go in, think about whether you can come out.