My life is limited, and I know it is infinite. From Zhuangzi's Internal Chapter, The Three Masters of Health Preservation. The book Zhuangzi, which has been handed down to this day, is the annotation of Guo Xiang in the Jin Dynasty. It is divided into three parts: internal, external and miscellaneous, with a total of 33 articles. From Master Zhuangzi, the original words are: My life is limited, but my knowledge is also limited. Life is limited, and knowledge is infinite (without boundaries). It is doomed to fail to pursue infinite knowledge with limited life.