"That aspect of it which cannot be fathomed
in terms of the light and the dark is called spirit.
"In their alternation and reciprocal effect,
the two fundamental forces serve
to explain all the phenomena in the world.
Nonetheless, there remains something
that cannot be explained in terms
of the interaction of these forces,
a final why. This ultimate meaning
of tao is the spirit, the divine,
the unfathomable in it, that
which must be revered in silence."
I Ching or Book of Changes, Richard Wilhelm translation
