道 德 經 Tao Te Ching – XIV.III 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.