Tao: the method and skill of pointing Tao in calligraphy.
Disease: the main defect or deficiency in calligraphy.
Sage: the person with the highest achievement.
Illness leads to illness, and Taoism is sacred-(people who are engaged in painting or calligraphy) have lost their way and their works are not perfect; If you master the Tao, you can become a great master.
This sentence has been extended to various fields, emphasizing that no matter what you do, you must master Taoism and skills.