Yujo:All human life begins with love between man and woman,from which the other unman relationships such as between father and son and between brothers follow.

• （吴）雨若曰：世界原从情字生出。有夫妇然后有父子，有父子然后有兄弟，有兄弟然后有朋友，有朋友然后有君臣。