1. I think, therefore I am.

2. Will, understanding, imagination, and all functions of feeling all come from thinking.

3. Only by obeying reason can we become adults.

4. A person who is dominated by emotions has no right to act independently and is at the mercy of fate.

5. Opposing opinions should be beneficial to me in two ways. On the one hand, it makes me realize my mistakes, and on the other hand, most people see it more clearly than one person can see.

6. I have not gained any other benefits from studying hard, except that I am more and more aware of my ignorance.

7. Make the pursuit of truth your lifelong career.

8. The world is big, but the most equitable distribution is common sense.

9. The main cause of fear is surprise, and the best way to get rid of it is to think beforehand and prepare yourself for all eventualities (surprises are caused by fear of them).

10. Reading a good book is like visiting the sages who wrote books and having a heart-to-heart talk with them, and it is a superb conversation.

11. My efforts to study have not gained any other benefits, but I have become more and more aware of my ignorance.

12. Doubt is the ancestor of reason.

13. People who act very erratically, as long as they start by following the right path, will be much ahead of those who leave the right path and run away.

14. When I doubt the existence of everything, I don’t have to doubt my own thoughts. Therefore, the only thing I can be sure of at this time is the existence of my own thoughts.

15. When emotions only persuade us to do things that can be delayed, we should restrain ourselves from making any decisions immediately, and use other thoughts to calm ourselves until time and rest make the blood flow. The mood completely calmed down.

16. The more you understand, the more you discover your ignorance.

17. A person who is dominated by emotions has no right to act independently and is at the mercy of fate.

18. Will, understanding, imagination, and all functions of feeling all come from thinking.

19. In this world, conscience is distributed most fairly.

20. Reading all good books means talking to many noble people.

21. Hesitation is the greatest harm.

22. It is not enough to have excellent intelligence. The important question is how to use it well.

23. Only by obeying reason can we become adults.

24. People who act very corruptly, as long as they start by following the right path, can be much ahead of those who leave the right path and run away.

25. Only by respecting others can others be respected.