Looking into the unknow future while constantly looking back,we expect to distinguish direction under the guidance of seven mansions.It is a practice of following nature and achieving harmony between man nature.
As kant said,Two things fill ten mind with ever new and increasing admiration and awe,the more often and steadily we reflect upon them:the starry heavens above me and the moral law within me.
Xuanwu: The god of the north worshiped by the Taoism.