Listen to this articleyuán dū yǐ wéi jīng 缘督以为经
Following the Du Meridian as the Law
因循自然的脉络以为常法。“缘督以为经”之说出自《庄子·养生主》。“督”指人脊背中线的脉络，居中而无形。庄子（前369？—前286）认为，事物存在发展的自然法则也具有这样的特点，并以此与世俗中有形而偏狭的道德规范相区别。“缘督以为经”也即是因循于无形而中正的自然法则，并以之为常法。只有这样才能顺行于万物之间，与万物无所悖逆。
This expression means to follow the natural meridian as a constant rule. This comes from Zhuangzi’s work “On Nurturing Life.” Du (督) refers here to the meridian along the human spine, central yet without form. Zhuangzi (369?-286 BC) held that the laws governing natural phenomena had the same characteristics. He differentiated this from narrow-minded and conventional moral laws. “Following the Du meridian as the law” means following a natural law, which is fair and invisible, and allows man to traverse among all things under heaven without running contrarily to them.
引例 Citation：
◎缘督以为经，可以保身，可以全生，可以养亲，可以尽年。（《庄子·养生主》）
（因循自然的脉络以为常法，可以保护身体，可以保全生命，可以奉养亲人，可以尽享天年。）
Following the natural meridian as a common law, a person can take good care of his health, his life, and his family members, and enjoy longevity. (Zhuangzi)
