The meaning is as follows:
Because through calligraphy we can get a glimpse of a person's soul and inner world. From the lines and ink of calligraphy works, we will perceive the author's mind, magnanimity, temperament and The relationship between character, calligraphy and heart is inseparable. Studying this issue has certain guiding significance for calligraphers to establish their own style. "Books are paintings from the heart" emphasizes using one's heart to figure out and using one's heart to express. As for the quality of personality and conduct, it cannot be fully presented. "Calligraphy is a painting of the heart" reveals an important feature of the art of calligraphy, that is, the essence of art: calligraphy is the product of the calligrapher's subjective spirit and the result of the action of the heart. "Articles are used to convey justice" is widely understood as "articles are used to express and spread justice and morality." This is a good statement, but it is not the original intention. The key to this sentence is "literacy" and "dao". "Wen" originally referred to single characters (combined characters are called "zi"). Later, it was extended to refer to writing in general, and also to diction, articles, culture, civilization, knowledge and other meanings.