The Danger of Yin and Yang

There is no weapon more lethal than willpower.

兵莫憯於志。

Even Mo Ye's sword is beneath it.

鏌鋣為下。

There is nothing more harmful than Yin and Yang.

寇莫大於陰陽。

There is nowhere between Heaven and Earth where it can be escaped.

無所逃於天地之間。

It is not Yin and Yang itself that harms people…

非陰陽賊之。

…but rather it is the mind that causes Yin and Yang to become harmful.

……心則使之也。

Analysis

“The workings of the mind or will upset the balance of the yin and yang within the body and automatically bring on illness.”

Burton Watson (1925-2017), "The Complete Works of Zhuangzi" (1968), Chapter 23, Footnote 14