"The way that can be spoken of
is not the constant way;
The name that can be named
is not the constant name.
The nameless was the
of heaven and earth;
The named was the mother
of the myriad creatures.
Hence always rid yourself of
in order to observe its manifestations,
But always allow yourself to have desires
in order to observe its secrets.
These two are the same
But diverge in name as they issue forth.
Being the same they are called mysteries;
Mystery upon mystery --
The gateway of the manifold secrets."
from the Tao Te Ching