How to treat "a good book doesn't choose a pen"

"A good book doesn't choose a pen" is not absolute. This sentence is a bit biased. This sentence means "good calligraphy", which means that when a person has a deep understanding of calligraphy, he can write excellent works according to the characteristics of using a pen, that is, according to local conditions. However, if you want to create any fonts in advance, or if you want your work to have any effect, you will have some requirements for the pen (what details, what tips, etc.). For example, if you are given a good pen and a bad pen to write the same words, the good pen will write better than the bad pen. Generally speaking, the quality of a pen still has an impact on writing.