The ancients said, "in a word, you can see its heart." What's the next sentence?

A few words in the article are its meaning, and a word in the book is its meaning: an article can express the author's meaning in a few words, and calligraphy can already tell the author's mood from one word. Calligraphy works can reflect the writer's spiritual track. Speaking of Zhang Tang's On Characters: "A few words in the text are its meaning, and a word in the book is its meaning, which can be described as simplicity." [Example] In the Han Dynasty, Yang Xiong first put forward the theory that calligraphy is also a painting of the mind, which means that calligraphy is the track of the mind. Since then, many calligraphers and calligraphers have inherited this idea. Liu Gongquan said in the Tang Dynasty: "The heart is right and the pen is right." Zhang Huaiguan said, "~" (Yang's Summary of China's Ancient Calligraphy Psychology) | "~" can be described as a simple way. The author's mood can be seen in one sentence, which is the characteristic that calligraphy art is different from poetry. Because calligraphy can become an independent and complete artistic image. From this, we can also know the origin of a person's aesthetics and method from one sentence. (Fang Zhien, "Don't be a buzzword after learning from others")