Isn't it a pleasant thing to persevere and work hard? Is it not delightful to have friends coming from distant quarters? Isn't he a completely moral person? Although people may not pay attention to him, he won't feel uneasy. -Pre-Qin Confucius and his disciples "The Analects of Confucius"

Isn't it pleasant to study (knowledge) and then review it at some time? Soon like-minded people will come from afar, isn't it fun? People don't understand (me) and (me) are not angry. Aren't they also people with moral cultivation? "

2, review the old and learn new, you can be a teacher. -Pre-Qin Confucius and his disciples "The Analects of Confucius for Politics"

If you review what you have learned, you can gain new understanding and experience from it, so you can become a teacher by virtue of this.

3, learning without thinking is useless, thinking without learning is dangerous. -Pre-Qin Confucius and his disciples "The Analects of Confucius for Politics"

Just studying without thinking will make you feel confused and at a loss, while dreaming without studying will make you full of doubts and indecision.

4. Knowing is not as good as being good, and being good is not as good as being happy. -Pre-Qin Confucius and his disciples "The Analects of Confucius Yong Ye"