易立

易立(역립)
공자는 '주역 계사상전 제12장에서, "乾坤 其易之縕耶. 乾坤成列 而易立乎其中矣. 乾坤毁則无以見易. 易不可見則乾坤或幾乎息矣"(乾坤은 易의 쌓음이다. 건곤을 벌리어 이루니, 易이 그 中에 立한다. 건곤이 훼손되면 易은 보이지 않고, 易을 볼 수 없으면, 건곤이 혹 쉬는 幾다)라고 건곤의 中에 易이 立한다.

Establishment of the Yi
Kongzi in Zhouyi:Book of changes,Xi Ci I: The Great Treatise I, Chapter 12 said, “We say that Qian and Kun are the secret and substance frame of the Yi.Qian and Kun being established in the Joong (center), The Yi (the system of changes) was thereby constituted. If Qian and Kun were taken away, there would be no means of seeing the Yi; and if the Yi were not seen, Qian and Kun would almost cease to act.” The Yi is established in the Joong (center)

易立
孔子在周易糸辞上传12说:“乾坤两卦是易皮勺精蕴。乾坤创成而分列，易就立于中。要是乾坤的象征毁灭，不可能出现易； 易不能出现，差不多要止息的机。”乾坤的中立于易。