The sentences about self-cultivation in Chapter 12 of The Analects of Confucius are as follows:

1. I examine myself three times every day: Have I been unfaithful to others? Make friends but don’t believe it? Are you not used to it?

Reflect on yourself many times every day and ask yourself whether you are loyal, trustworthy and faithful. Loyalty here means doing your best to help others, trust means keeping your promises when interacting with friends, and practice means reviewing the knowledge and principles you have learned. Through such self-reflection, we can better cultivate our moral character.

2. A gentleman is likened to righteousness, and a villain is likened to benefit.

This sentence is to warn people to pay attention to the distinction between justice and benefit. A gentleman values ??morality and justice, while a villain values ??interests and self-interest. As gentlemen, we should understand that we should follow the principles of morality and justice when doing things, and we should not violate morality for personal gain.

3. When you see a virtuous person, think about them, and when you see a virtuous person, you should reflect on yourself.

When we see a virtuous person, we should imitate him; when we see a virtuous person, we should reflect on whether we have similar problems. This sentence warns us to constantly reflect on ourselves and make continuous progress.

4. Those who know are not as good as those who are good at it, and those who are good at it are not as good as those who are happy.

For learning or doing things, it is not enough to just know how to do it. What is more important is to like to do it. Only if you like to do it can you truly enjoy it and achieve mastery. This sentence warns us to love our work and study so that we can be the best in the field we are engaged in.

Benefits of studying "The Analects of Confucius":

1. Improve moral cultivation: "The Analects of Confucius" is one of the representative works of Confucian classics, rich in ethics, etiquette and other ideas. By studying the Analects of Confucius, we can better understand and practice these moral norms, improve our moral cultivation, and become more virtuous people.

2. Enhance cultural literacy: "The Analects" is a treasure of Chinese culture, which contains rich knowledge of history, culture, philosophy and so on. Studying "The Analects of Confucius" can allow us to better understand Chinese culture, enhance cultural literacy, and improve our overall quality.

3. Cultivate learning ability: Learning "The Analects" requires us to think and understand, which helps cultivate our learning ability. By studying "The Analects of Confucius", we can better master learning methods, improve learning efficiency, and better cope with various learning tasks.

4. Promote interpersonal communication: "The Analects" emphasizes the relationship between people and how to get along with each other. Learning "The Analects" can allow us to better understand and deal with interpersonal relationships, and improve our own Social skills to promote interpersonal communication.

5. Enhance thinking ability: Learning "The Analects" requires us to think and analyze, which helps to enhance our thinking ability. By studying "The Analects of Confucius", we can better master methods of logical thinking, analyzing problems, etc., and improve our thinking level.