辯正論 6.57

6.57

注彈曰。乾為陽為父。莅在西北。坤為陰為母。卜之西南。北方盛陰之鄉。便為中男之位。南方盛陽之地。翻成中女之居。男女既無定方。陰陽不拘恒准。所以木賊土故以己為甲妻。金剋木故以乙為庚妻。乾既位高乃居西北。震能出帝復在東方。至如禮席。若南北鋪之。即以西方為上。言順乾尊也。東西列之。即以南方為上。言逐陽盛也。優劣自見。此之謂歟。

The Note of Rebuttal says: Qian is yang and the father, residing in the northwest; Kun is yin and the mother, divined in the southwest. The north is the realm of flourishing yin, yet it becomes the position of the middle son; the south is the land of flourishing yang, yet it turns into the dwelling of the middle daughter. Since male and female have no fixed directions, yin and yang are not bound by a permanent standard. Thus, wood plunders earth, so Ji is taken as the wife of Jia; metal overcomes wood, so Yi is taken as the wife of Geng. Since Qian's position is lofty, it resides in the northwest; Zhen can bring forth the thearch, yet it is in the east. As for ritual mats, if spread from north to south, the west is considered supreme, which is said to conform to the honor of Qian; if arranged from east to west, the south is considered supreme, which is said to follow the fullness of yang. Superiority and inferiority are naturally evident—is this not what is meant?