Those who are calm will not be impetuous, and those who are steady will not be frivolous. The source is "The Book of Rites: Doctrine of the Mean". A person with a calm mind will not be impetuous, and a person with a calm mind will not be frivolous. This sentence comes from a proverb in "Book of Rites: Doctrine of the Mean": "A person with a calm mind will not be impetuous, a person with a calm mind will not be frivolous. , so as not to lose what you want and do what you must." This sentence means that if a person has a stable heart and will not be easily shaken by external influences, he can remain calm and composed. , and will not appear impetuous and frivolous, such people can get what they want and achieve their goals.