道德經 Tao Te Ching : XIV
道其上不皦 、其下不昧 。
繩繩不可名 、復歸於無物 。
是謂無狀之狀 、無物之象 、是謂惚恍 。
迎之不見其首 、隨之不見其後 。
Its upper part is not dazzling;
Its lower part is not obscure.
Dimly visible, it cannot be named;
And returns to that which is without substance.
This is called the shape that has no shape;
The image that is without substance;
This is called indistinct and shadowy.
Go up to it and you will not see its head;
Follow behind it and you will not see its rear.