Why can calligraphy reflect people's character and wisdom?

Piano, chess, calligraphy and painting are the four virtues of a gentleman, and most literati enjoy it. Among them, "book" refers to our calligraphy art, and you can see people's character from calligraphy. Mi Fei, one of the four great masters in Song Dynasty, was called Mi Dian. He has been an official many times in his life, but he can't live in the dirty officialdom in the end. As a result, he wandered among the pastoral landscapes and poured his feelings into his own painting and calligraphy art. His calligraphy was wild and eclectic, showing an unruly personality. Indeed, the art of calligraphy can embody character and wisdom. Kang Youwei's sharp calligraphy in Qing dynasty reflected his dissatisfaction with the society at that time and had the momentum to fight back. During the Republic of China, Master Hongyi had a profound knowledge of calligraphy, and his fonts were both rigid and soft. You can even read between the lines to see the mentality of a generation of eminent monks who are divorced from the secular and uncontested. Learning calligraphy can be practiced from the aspects of calligraphy art, body and mind, morality and so on. Let calligraphy and character rise to a higher level at the same time. Therefore, it is a good thing for children to love and learn calligraphy since childhood, which is worth promoting.