1. Quick and eager to learn, not ashamed to ask questions - Confucius

2. Proficiency comes from hard work, but waste from play; success comes from thinking, failure comes from following - Han Yu

3. Learning without thinking is useless, thinking without learning is dangerous - Confucius

4. Those who know are not as good as those who are good, and those who are good are not as good as those who are happy - Confucius

5. When three of us are together, there must be my teacher.

In scientific works, it is best to read the latest books; in literary works, it is best to read the oldest books. Classical literature never ages.