if there is something wrong, correct it, and if there is nothing wrong, encourage yourself not to make mistakes.

The source of The Analects of Confucius: "Zeng Zi said,' I save myself three times a day.' "Song Zhu Xi's Notes": "Ceng Zi saves its health by these three aspects, and if it has, it will change it, and if it has not, it will encourage it. Its autonomy is so sincere that it can be said that it is the foundation of learning."