The writer is scattered. If you want to write, you should first let go of your arms, let your emotions run wild, and then write; if you are forced to do so, even if you are a rabbit in Zhongshan, you will not be able to do well. To write a book, first sit silently and meditate, do as you please, no words come out, no breath, no breathing, and a deep expression, as if you are treating the Supreme Being, then there is nothing wrong with it. For the body of a book, it must be shaped by people: if it is sitting or walking, if it is flying or if it is moving, if it is going or coming, if it is lying down or if it is rising, if it is sad or happy, if it is like insects eating wood leaves, if it is a sharp sword, if it is a long sword, if if it is a strong bow, it will be hard. The arrows are like water and fire, like clouds and mist, like the sun and the moon. Only those that can be imaged vertically and horizontally can be called a book. 
[Comment] The quality of a calligrapher’s spirit is closely related to the effect of his calligraphy creation. Forced by circumstances. If you are in a bad mood, even if you have the best writing brush, you will not be able to write well. As long as your mind is casual and focused, and if the tools are good, your writing will be wonderful.

Introduction to Cai Yong